diff --git a/colorm/draw.go b/colorm/draw.go
index aa60a105a..e51b7052c 100644
--- a/colorm/draw.go
+++ b/colorm/draw.go
@@ -42,7 +42,6 @@ func DrawImage(dst, src *ebiten.Image, colorM ColorM, op *DrawImageOptions) {
 		op = &DrawImageOptions{}
 	}
 
-	w, h := src.Size()
 	opShader := &ebiten.DrawRectShaderOptions{}
 	opShader.GeoM = op.GeoM
 	opShader.CompositeMode = ebiten.CompositeModeCustom
@@ -50,7 +49,7 @@ func DrawImage(dst, src *ebiten.Image, colorM ColorM, op *DrawImageOptions) {
 	opShader.Uniforms = uniforms(colorM)
 	opShader.Images[0] = src
 	s := builtinShader(builtinshader.Filter(op.Filter), builtinshader.AddressUnsafe)
-	dst.DrawRectShader(w, h, s, opShader)
+	dst.DrawRectShader(src.Bounds().Dx(), src.Bounds().Dy(), s, opShader)
 }
 
 // DrawTrianglesOptions represents options for DrawTriangles.
diff --git a/ebitenutil/debugprint.go b/ebitenutil/debugprint.go
index 900a567ff..c55988e99 100644
--- a/ebitenutil/debugprint.go
+++ b/ebitenutil/debugprint.go
@@ -59,7 +59,7 @@ func drawDebugText(rt *ebiten.Image, str string, ox, oy int) {
 	op := &ebiten.DrawImageOptions{}
 	x := 0
 	y := 0
-	w, _ := debugPrintTextImage.Size()
+	w := debugPrintTextImage.Bounds().Dx()
 	for _, c := range str {
 		const (
 			cw = 6
diff --git a/ebitenutil/fs_test.go b/ebitenutil/fs_test.go
index d37cf97c1..250f5a646 100644
--- a/ebitenutil/fs_test.go
+++ b/ebitenutil/fs_test.go
@@ -16,6 +16,7 @@ package ebitenutil_test
 
 import (
 	"embed"
+	"image"
 	// `NewImageFromFileSystem` works without this importing, but this is not an expected thing (#2336).
 	_ "image/png"
 	"testing"
@@ -31,11 +32,7 @@ func TestNewImageFromFileSystem(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	w, h := img.Size()
-	if got, want := w, 192; got != want {
-		t.Errorf("got: %d, want: %d", got, want)
-	}
-	if got, want := h, 128; got != want {
-		t.Errorf("got: %d, want: %d", got, want)
+	if got, want := img.Bounds().Size(), image.Pt(192, 128); got != want {
+		t.Errorf("got: %v, want: %v", got, want)
 	}
 }
diff --git a/examples/2048/2048/game.go b/examples/2048/2048/game.go
index cd62f4160..dcb1ec482 100644
--- a/examples/2048/2048/game.go
+++ b/examples/2048/2048/game.go
@@ -68,14 +68,13 @@ func (g *Game) Update() error {
 // Draw draws the current game to the given screen.
 func (g *Game) Draw(screen *ebiten.Image) {
 	if g.boardImage == nil {
-		w, h := g.board.Size()
-		g.boardImage = ebiten.NewImage(w, h)
+		g.boardImage = ebiten.NewImage(g.board.Size())
 	}
 	screen.Fill(backgroundColor)
 	g.board.Draw(g.boardImage)
 	op := &ebiten.DrawImageOptions{}
-	sw, sh := screen.Size()
-	bw, bh := g.boardImage.Size()
+	sw, sh := screen.Bounds().Dx(), screen.Bounds().Dy()
+	bw, bh := g.boardImage.Bounds().Dx(), g.boardImage.Bounds().Dy()
 	x := (sw - bw) / 2
 	y := (sh - bh) / 2
 	op.GeoM.Translate(float64(x), float64(y))
diff --git a/examples/additive/main.go b/examples/additive/main.go
index f0a021fbd..463d6d8a0 100644
--- a/examples/additive/main.go
+++ b/examples/additive/main.go
@@ -56,7 +56,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 
 	// Draw the image with 'Lighter (a.k.a Additive)' blend mode.
 	op = &ebiten.DrawImageOptions{}
-	w, _ := ebitenImage.Size()
+	w := ebitenImage.Bounds().Dx()
 	op.GeoM.Translate(ox+float64(w), oy)
 	op.Blend = ebiten.BlendLighter
 	screen.DrawImage(ebitenImage, op)
diff --git a/examples/airship/main.go b/examples/airship/main.go
index f3361bcec..1565b0f6f 100644
--- a/examples/airship/main.go
+++ b/examples/airship/main.go
@@ -54,7 +54,7 @@ func init() {
 		xrepeat = 7
 		yrepeat = 8
 	)
-	w, h := gophersImage.Size()
+	w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
 	repeatedGophersImage = ebiten.NewImage(w*xrepeat, h*yrepeat)
 	for j := 0; j < yrepeat; j++ {
 		for i := 0; i < xrepeat; i++ {
@@ -87,7 +87,7 @@ func round(x float64) float64 {
 
 // MoveForward moves the player p forward.
 func (p *player) MoveForward() {
-	w, h := gophersImage.Size()
+	w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
 	mx := w * 16
 	my := h * 16
 	s, c := math.Sincos(float64(p.angle) * 2 * math.Pi / maxAngle)
@@ -157,8 +157,8 @@ func (g *Game) updateGroundImage(ground *ebiten.Image) {
 
 	x16, y16 := g.player.Position()
 	a := g.player.Angle()
-	rw, rh := repeatedGophersImage.Size()
-	gw, gh := ground.Size()
+	rw, rh := repeatedGophersImage.Bounds().Dx(), repeatedGophersImage.Bounds().Dy()
+	gw, gh := ground.Bounds().Dx(), ground.Bounds().Dy()
 	op := &ebiten.DrawImageOptions{}
 	op.GeoM.Translate(float64(-x16)/16, float64(-y16)/16)
 	op.GeoM.Translate(float64(-rw)/2, float64(-rh)/2)
@@ -170,8 +170,8 @@ func (g *Game) updateGroundImage(ground *ebiten.Image) {
 // drawGroundImage draws the ground image to the given screen image.
 func (g *Game) drawGroundImage(screen *ebiten.Image, ground *ebiten.Image) {
 	g.perspectiveGroundImage.Clear()
-	gw, _ := ground.Size()
-	pw, ph := g.perspectiveGroundImage.Size()
+	gw := ground.Bounds().Dx()
+	pw, ph := g.perspectiveGroundImage.Bounds().Dx(), g.perspectiveGroundImage.Bounds().Dy()
 	for j := 0; j < ph; j++ {
 		// z is in [2, -1]
 		rate := float64(j) / float64(ph)
@@ -217,7 +217,7 @@ func NewGame() *Game {
 	}
 
 	const fogHeight = 16
-	w, _ := g.perspectiveGroundImage.Size()
+	w := g.perspectiveGroundImage.Bounds().Dx()
 	fogRGBA := image.NewRGBA(image.Rect(0, 0, w, fogHeight))
 	for j := 0; j < fogHeight; j++ {
 		a := uint32(float64(fogHeight-1-j) * 0xff / (fogHeight - 1))
diff --git a/examples/audio/main.go b/examples/audio/main.go
index d6ccdea32..e62572b13 100644
--- a/examples/audio/main.go
+++ b/examples/audio/main.go
@@ -162,7 +162,7 @@ func NewPlayer(game *Game, audioContext *audio.Context, musicType musicType) (*P
 	}
 
 	const buttonPadding = 16
-	w, _ := playButtonImage.Size()
+	w := playButtonImage.Bounds().Dx()
 	player.playButtonPosition.X = (screenWidth - w*2 + buttonPadding*1) / 2
 	player.playButtonPosition.Y = screenHeight - 160
 
@@ -226,7 +226,7 @@ func (p *Player) shouldPlaySE() bool {
 	}
 	r := image.Rectangle{
 		Min: p.alertButtonPosition,
-		Max: p.alertButtonPosition.Add(image.Pt(alertButtonImage.Size())),
+		Max: p.alertButtonPosition.Add(alertButtonImage.Bounds().Size()),
 	}
 	if image.Pt(ebiten.CursorPosition()).In(r) {
 		if inpututil.IsMouseButtonJustPressed(ebiten.MouseButtonLeft) {
@@ -271,7 +271,7 @@ func (p *Player) shouldSwitchPlayStateIfNeeded() bool {
 	}
 	r := image.Rectangle{
 		Min: p.playButtonPosition,
-		Max: p.playButtonPosition.Add(image.Pt(playButtonImage.Size())),
+		Max: p.playButtonPosition.Add(playButtonImage.Bounds().Size()),
 	}
 	if image.Pt(ebiten.CursorPosition()).In(r) {
 		if inpututil.IsMouseButtonJustPressed(ebiten.MouseButtonLeft) {
diff --git a/examples/blocks/blocks/gamescene.go b/examples/blocks/blocks/gamescene.go
index d4129ba8b..fab944cd3 100644
--- a/examples/blocks/blocks/gamescene.go
+++ b/examples/blocks/blocks/gamescene.go
@@ -170,7 +170,7 @@ func init() {
 func (s *GameScene) drawBackground(r *ebiten.Image) {
 	r.Fill(color.White)
 
-	w, h := imageGameBG.Size()
+	w, h := imageGameBG.Bounds().Dx(), imageGameBG.Bounds().Dy()
 	scaleW := ScreenWidth / float64(w)
 	scaleH := ScreenHeight / float64(h)
 	scale := scaleW
diff --git a/examples/blocks/blocks/titlescene.go b/examples/blocks/blocks/titlescene.go
index f6bfaff9b..d3d8f151f 100644
--- a/examples/blocks/blocks/titlescene.go
+++ b/examples/blocks/blocks/titlescene.go
@@ -94,7 +94,7 @@ func (s *TitleScene) Draw(r *ebiten.Image) {
 }
 
 func (s *TitleScene) drawTitleBackground(r *ebiten.Image, c int) {
-	w, h := imageBackground.Size()
+	w, h := imageBackground.Bounds().Dx(), imageBackground.Bounds().Dy()
 	op := &ebiten.DrawImageOptions{}
 	for i := 0; i < (ScreenWidth/w+1)*(ScreenHeight/h+2); i++ {
 		op.GeoM.Reset()
diff --git a/examples/clip/main.go b/examples/clip/main.go
index e4da10419..d6de71f87 100644
--- a/examples/clip/main.go
+++ b/examples/clip/main.go
@@ -44,7 +44,7 @@ func (g *Game) Update() error {
 }
 
 func (g *Game) Draw(screen *ebiten.Image) {
-	w, h := gophersImage.Size()
+	w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
 	op := &ebiten.DrawImageOptions{}
 
 	// Move the image's center to the screen's upper-left corner.
diff --git a/examples/contextlost/main.go b/examples/contextlost/main.go
index 958f324b9..180ea237a 100644
--- a/examples/contextlost/main.go
+++ b/examples/contextlost/main.go
@@ -64,11 +64,11 @@ func (g *Game) Draw(screen *ebiten.Image) {
 		return
 	}
 
-	w, h := gophersImage.Size()
+	s := gophersImage.Bounds().Size()
 	op := &ebiten.DrawImageOptions{}
 
 	// For the details, see examples/rotate.
-	op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
+	op.GeoM.Translate(-float64(s.X)/2, -float64(s.Y)/2)
 	op.GeoM.Rotate(float64(g.count%360) * 2 * math.Pi / 360)
 	op.GeoM.Translate(screenWidth/2, screenHeight/2)
 	screen.DrawImage(gophersImage, op)
diff --git a/examples/drag/main.go b/examples/drag/main.go
index f83e05bbc..8cb05b5f7 100644
--- a/examples/drag/main.go
+++ b/examples/drag/main.go
@@ -58,7 +58,7 @@ func (s *Sprite) In(x, y int) bool {
 
 // MoveBy moves the sprite by (x, y).
 func (s *Sprite) MoveBy(x, y int) {
-	w, h := s.image.Size()
+	w, h := s.image.Bounds().Dx(), s.image.Bounds().Dy()
 
 	s.x += x
 	s.y += y
@@ -200,7 +200,7 @@ func init() {
 func NewGame() *Game {
 	// Initialize the sprites.
 	sprites := []*Sprite{}
-	w, h := ebitenImage.Size()
+	w, h := ebitenImage.Bounds().Dx(), ebitenImage.Bounds().Dy()
 	for i := 0; i < 50; i++ {
 		s := &Sprite{
 			image: ebitenImage,
diff --git a/examples/flappy/main.go b/examples/flappy/main.go
index df2e03859..7cd5c92bb 100644
--- a/examples/flappy/main.go
+++ b/examples/flappy/main.go
@@ -353,7 +353,7 @@ func (g *Game) hit() bool {
 		gopherWidth  = 30
 		gopherHeight = 60
 	)
-	w, h := gopherImage.Size()
+	w, h := gopherImage.Bounds().Dx(), gopherImage.Bounds().Dy()
 	x0 := floorDiv(g.x16, 16) + (w-gopherWidth)/2
 	y0 := floorDiv(g.y16, 16) + (h-gopherHeight)/2
 	x1 := x0 + gopherWidth
@@ -437,7 +437,7 @@ func (g *Game) drawTiles(screen *ebiten.Image) {
 
 func (g *Game) drawGopher(screen *ebiten.Image) {
 	op := &ebiten.DrawImageOptions{}
-	w, h := gopherImage.Size()
+	w, h := gopherImage.Bounds().Dx(), gopherImage.Bounds().Dy()
 	op.GeoM.Translate(-float64(w)/2.0, -float64(h)/2.0)
 	op.GeoM.Rotate(float64(g.vy16) / 96.0 * math.Pi / 6)
 	op.GeoM.Translate(float64(w)/2.0, float64(h)/2.0)
@@ -461,12 +461,12 @@ func (g *GameWithCRTEffect) DrawFinalScreen(screen ebiten.FinalScreen, offscreen
 		g.crtShader = s
 	}
 
-	ow, oh := offscreen.Size()
+	os := offscreen.Bounds().Size()
 
 	op := &ebiten.DrawRectShaderOptions{}
 	op.Images[0] = offscreen
 	op.GeoM = geoM
-	screen.DrawRectShader(ow, oh, g.crtShader, op)
+	screen.DrawRectShader(os.X, os.Y, g.crtShader, op)
 }
 
 func main() {
diff --git a/examples/fullscreen/main.go b/examples/fullscreen/main.go
index 89bf13698..d92cfd7fe 100644
--- a/examples/fullscreen/main.go
+++ b/examples/fullscreen/main.go
@@ -86,13 +86,13 @@ func (g *Game) Update() error {
 func (g *Game) Draw(screen *ebiten.Image) {
 	scale := ebiten.DeviceScaleFactor()
 
-	w, h := gophersImage.Size()
+	w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
 	op := &ebiten.DrawImageOptions{}
 
 	op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
 	op.GeoM.Scale(scale, scale)
 	op.GeoM.Rotate(float64(g.count%360) * 2 * math.Pi / 360)
-	sw, sh := screen.Size()
+	sw, sh := screen.Bounds().Dx(), screen.Bounds().Dy()
 	op.GeoM.Translate(float64(sw)/2, float64(sh)/2)
 	op.Filter = ebiten.FilterLinear
 	screen.DrawImage(gophersImage, op)
diff --git a/examples/highdpi/main.go b/examples/highdpi/main.go
index 696cb156c..240197429 100644
--- a/examples/highdpi/main.go
+++ b/examples/highdpi/main.go
@@ -71,9 +71,9 @@ func (g *Game) Draw(screen *ebiten.Image) {
 		return
 	}
 
-	sw, sh := screen.Size()
+	sw, sh := screen.Bounds().Dx(), screen.Bounds().Dy()
 
-	w, h := g.highDPIImage.Size()
+	w, h := g.highDPIImage.Bounds().Dx(), g.highDPIImage.Bounds().Dy()
 	op := &ebiten.DrawImageOptions{}
 
 	// Move the images's center to the upper left corner.
diff --git a/examples/hsv/main.go b/examples/hsv/main.go
index 048624597..236b6be55 100644
--- a/examples/hsv/main.go
+++ b/examples/hsv/main.go
@@ -100,9 +100,9 @@ func (g *Game) Update() error {
 
 func (g *Game) Draw(screen *ebiten.Image) {
 	// Center the image on the screen.
-	w, h := gophersImage.Size()
+	s := gophersImage.Bounds().Size()
 	op := &colorm.DrawImageOptions{}
-	op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
+	op.GeoM.Translate(-float64(s.X)/2, -float64(s.Y)/2)
 	op.GeoM.Scale(2, 2)
 	op.GeoM.Translate(float64(screenWidth)/2, float64(screenHeight)/2)
 
diff --git a/examples/hue/main.go b/examples/hue/main.go
index a253e5f77..675d71f93 100644
--- a/examples/hue/main.go
+++ b/examples/hue/main.go
@@ -46,9 +46,9 @@ func (g *Game) Update() error {
 
 func (g *Game) Draw(screen *ebiten.Image) {
 	// Center the image on the screen.
-	w, h := gophersImage.Size()
+	s := gophersImage.Bounds().Size()
 	op := &colorm.DrawImageOptions{}
-	op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
+	op.GeoM.Translate(-float64(s.X)/2, -float64(s.Y)/2)
 	op.GeoM.Scale(2, 2)
 	op.GeoM.Translate(float64(screenWidth)/2, float64(screenHeight)/2)
 
diff --git a/examples/infinitescroll/main.go b/examples/infinitescroll/main.go
index 2944b19d1..408abe39f 100644
--- a/examples/infinitescroll/main.go
+++ b/examples/infinitescroll/main.go
@@ -50,12 +50,12 @@ type viewport struct {
 }
 
 func (p *viewport) Move() {
-	w, h := bgImage.Size()
-	maxX16 := w * 16
-	maxY16 := h * 16
+	s := bgImage.Bounds().Size()
+	maxX16 := s.X * 16
+	maxY16 := s.Y * 16
 
-	p.x16 += w / 32
-	p.y16 += h / 32
+	p.x16 += s.X / 32
+	p.y16 += s.Y / 32
 	p.x16 %= maxX16
 	p.y16 %= maxY16
 }
@@ -79,7 +79,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 
 	// Draw bgImage on the screen repeatedly.
 	const repeat = 3
-	w, h := bgImage.Size()
+	w, h := bgImage.Bounds().Dx(), bgImage.Bounds().Dy()
 	for j := 0; j < repeat; j++ {
 		for i := 0; i < repeat; i++ {
 			op := &ebiten.DrawImageOptions{}
diff --git a/examples/isometric/game.go b/examples/isometric/game.go
index 322804f3d..752cc2750 100644
--- a/examples/isometric/game.go
+++ b/examples/isometric/game.go
@@ -191,15 +191,14 @@ func (g *Game) renderLevel(screen *ebiten.Image) {
 	// To avoid them, render the result on an offscreen first and then scale it later.
 	if scaleLater {
 		if g.offscreen != nil {
-			w, h := g.offscreen.Size()
-			sw, sh := screen.Size()
-			if w != sw || h != sh {
+			if g.offscreen.Bounds().Size() != screen.Bounds().Size() {
 				g.offscreen.Dispose()
 				g.offscreen = nil
 			}
 		}
 		if g.offscreen == nil {
-			g.offscreen = ebiten.NewImage(screen.Size())
+			s := screen.Bounds().Size()
+			g.offscreen = ebiten.NewImage(s.X, s.Y)
 		}
 		target = g.offscreen
 		target.Clear()
diff --git a/examples/lines/main.go b/examples/lines/main.go
index 38575d9af..6563fabf4 100644
--- a/examples/lines/main.go
+++ b/examples/lines/main.go
@@ -87,7 +87,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 		vector.LineCapSquare,
 	}
 
-	ow, oh := target.Size()
+	ow, oh := target.Bounds().Dx(), target.Bounds().Dy()
 	size := min(ow/(len(joins)+1), oh/(len(caps)+1))
 	offsetX, offsetY := (ow-size*len(joins))/2, (oh-size*len(caps))/2
 
diff --git a/examples/masking/main.go b/examples/masking/main.go
index 24474de93..5fdb53dfd 100644
--- a/examples/masking/main.go
+++ b/examples/masking/main.go
@@ -102,8 +102,8 @@ func (g *Game) Update() error {
 		g.spotLightY = -g.spotLightY
 		g.spotLightVY = -g.spotLightVY
 	}
-	w, h := spotLightImage.Size()
-	maxX, maxY := screenWidth-w, screenHeight-h
+	s := spotLightImage.Bounds().Size()
+	maxX, maxY := screenWidth-s.X, screenHeight-s.Y
 	if maxX < g.spotLightX {
 		g.spotLightX = -g.spotLightX + 2*maxX
 		g.spotLightVX = -g.spotLightVX
diff --git a/examples/minify/main.go b/examples/minify/main.go
index e924d540f..f8847866b 100644
--- a/examples/minify/main.go
+++ b/examples/minify/main.go
@@ -66,7 +66,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 
 	clippedGophersImage := gophersImage.SubImage(image.Rect(100, 100, 200, 200)).(*ebiten.Image)
 	for i, f := range []ebiten.Filter{ebiten.FilterNearest, ebiten.FilterLinear} {
-		w, h := gophersImage.Size()
+		w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
 
 		op := &ebiten.DrawImageOptions{}
 		if g.rotate {
diff --git a/examples/moire/main.go b/examples/moire/main.go
index e8c78893c..7a53c7ad0 100644
--- a/examples/moire/main.go
+++ b/examples/moire/main.go
@@ -90,7 +90,8 @@ func (g *game) Update() error {
 }
 
 func (g *game) Draw(screen *ebiten.Image) {
-	screen.WritePixels(getDots(screen.Size()))
+	s := screen.Bounds().Size()
+	screen.WritePixels(getDots(s.X, s.Y))
 }
 
 func main() {
diff --git a/examples/mosaic/main.go b/examples/mosaic/main.go
index f9ad6faf5..16cf747eb 100644
--- a/examples/mosaic/main.go
+++ b/examples/mosaic/main.go
@@ -70,7 +70,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }
 
 func main() {
-	w, h := gophersImage.Size()
+	w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
 	g := &Game{
 		gophersRenderTarget: ebiten.NewImage(w/mosaicRatio, h/mosaicRatio),
 	}
diff --git a/examples/particles/main.go b/examples/particles/main.go
index d30538a8a..b1b44b71b 100644
--- a/examples/particles/main.go
+++ b/examples/particles/main.go
@@ -87,7 +87,7 @@ func (s *sprite) draw(screen *ebiten.Image) {
 
 	op := &ebiten.DrawImageOptions{}
 
-	sx, sy := s.img.Size()
+	sx, sy := s.img.Bounds().Dx(), s.img.Bounds().Dy()
 	op.GeoM.Translate(-float64(sx)/2, -float64(sy)/2)
 	op.GeoM.Rotate(s.angle)
 	op.GeoM.Scale(s.scale, s.scale)
diff --git a/examples/perspective/main.go b/examples/perspective/main.go
index bc30055d3..0fdc574ff 100644
--- a/examples/perspective/main.go
+++ b/examples/perspective/main.go
@@ -42,7 +42,7 @@ func (g *Game) Update() error {
 func (g *Game) Draw(screen *ebiten.Image) {
 	// Split the image into horizontal lines and draw them with different scales.
 	op := &ebiten.DrawImageOptions{}
-	w, h := gophersImage.Size()
+	w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
 	for i := 0; i < h; i++ {
 		op.GeoM.Reset()
 
diff --git a/examples/rotate/main.go b/examples/rotate/main.go
index 23af2bafc..2ab852901 100644
--- a/examples/rotate/main.go
+++ b/examples/rotate/main.go
@@ -44,13 +44,13 @@ func (g *Game) Update() error {
 }
 
 func (g *Game) Draw(screen *ebiten.Image) {
-	w, h := gophersImage.Size()
+	s := gophersImage.Bounds().Size()
 	op := &ebiten.DrawImageOptions{}
 
 	// Move the image's center to the screen's upper-left corner.
 	// This is a preparation for rotating. When geometry matrices are applied,
 	// the origin point is the upper-left corner.
-	op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
+	op.GeoM.Translate(-float64(s.X)/2, -float64(s.Y)/2)
 
 	// Rotate the image. As a result, the anchor point of this rotate is
 	// the center of the image.
diff --git a/examples/set/main.go b/examples/set/main.go
index af97515cb..bb00c50d7 100644
--- a/examples/set/main.go
+++ b/examples/set/main.go
@@ -45,9 +45,9 @@ func NewGame() *Game {
 }
 
 func (g *Game) Update() error {
-	w, h := g.offscreen.Size()
-	x := rand.Intn(w)
-	y := rand.Intn(h)
+	s := g.offscreen.Bounds().Size()
+	x := rand.Intn(s.X)
+	y := rand.Intn(s.Y)
 	c := color.RGBA{
 		byte(rand.Intn(256)),
 		byte(rand.Intn(256)),
diff --git a/examples/shader/main.go b/examples/shader/main.go
index a532b8f7d..67e634fa8 100644
--- a/examples/shader/main.go
+++ b/examples/shader/main.go
@@ -141,7 +141,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 		return
 	}
 
-	w, h := screen.Size()
+	w, h := screen.Bounds().Dx(), screen.Bounds().Dy()
 	cx, cy := ebiten.CursorPosition()
 
 	op := &ebiten.DrawRectShaderOptions{}
diff --git a/examples/skipdraw/main.go b/examples/skipdraw/main.go
index cd9464b68..3cfd18df3 100644
--- a/examples/skipdraw/main.go
+++ b/examples/skipdraw/main.go
@@ -61,13 +61,13 @@ func (g *Game) Draw(screen *ebiten.Image) {
 
 	screen.Clear()
 
-	w, h := gophersImage.Size()
+	s := gophersImage.Bounds().Size()
 	op := &ebiten.DrawImageOptions{}
 
 	// Move the image's center to the screen's upper-left corner.
 	// This is a preparation for rotating. When geometry matrices are applied,
 	// the origin point is the upper-left corner.
-	op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
+	op.GeoM.Translate(-float64(s.X)/2, -float64(s.Y)/2)
 
 	// Rotate the image. As a result, the anchor point of this rotate is
 	// the center of the image.
diff --git a/examples/sprites/main.go b/examples/sprites/main.go
index 795d015d0..16afb0da6 100644
--- a/examples/sprites/main.go
+++ b/examples/sprites/main.go
@@ -46,8 +46,8 @@ func init() {
 	}
 	origEbitenImage := ebiten.NewImageFromImage(img)
 
-	w, h := origEbitenImage.Size()
-	ebitenImage = ebiten.NewImage(w, h)
+	s := origEbitenImage.Bounds().Size()
+	ebitenImage = ebiten.NewImage(s.X, s.Y)
 
 	op := &ebiten.DrawImageOptions{}
 	op.ColorScale.ScaleAlpha(0.5)
@@ -118,7 +118,7 @@ func (g *Game) init() {
 	g.sprites.sprites = make([]*Sprite, MaxSprites)
 	g.sprites.num = 500
 	for i := range g.sprites.sprites {
-		w, h := ebitenImage.Size()
+		w, h := ebitenImage.Bounds().Dx(), ebitenImage.Bounds().Dy()
 		x, y := rand.Intn(screenWidth-w), rand.Intn(screenHeight-h)
 		vx, vy := 2*rand.Intn(2)-1, 2*rand.Intn(2)-1
 		a := rand.Intn(maxAngle)
@@ -187,7 +187,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 	// some conditions e.g. all the rendering sources and targets are same.
 	// For more detail, see:
 	// https://pkg.go.dev/github.com/hajimehoshi/ebiten/v2#Image.DrawImage
-	w, h := ebitenImage.Size()
+	w, h := ebitenImage.Bounds().Dx(), ebitenImage.Bounds().Dy()
 	for i := 0; i < g.sprites.num; i++ {
 		s := g.sprites.sprites[i]
 		g.op.GeoM.Reset()
diff --git a/examples/spriteshd/main.go b/examples/spriteshd/main.go
index b03fb5582..4d6dd5635 100644
--- a/examples/spriteshd/main.go
+++ b/examples/spriteshd/main.go
@@ -47,8 +47,8 @@ func init() {
 	}
 	origEbitenImage := ebiten.NewImageFromImage(img)
 
-	w, h := origEbitenImage.Size()
-	ebitenImage = ebiten.NewImage(w, h)
+	s := origEbitenImage.Bounds().Size()
+	ebitenImage = ebiten.NewImage(s.X, s.Y)
 
 	op := &ebiten.DrawImageOptions{}
 	op.ColorScale.ScaleAlpha(0.5)
@@ -116,7 +116,7 @@ func (g *Game) init() {
 	g.sprites.sprites = make([]*Sprite, MaxSprites)
 	g.sprites.num = 500
 	for i := range g.sprites.sprites {
-		w, h := ebitenImage.Size()
+		w, h := ebitenImage.Bounds().Dx(), ebitenImage.Bounds().Dy()
 		x, y := rand.Intn(screenWidth-w), rand.Intn(screenHeight-h)
 		vx, vy := 2*rand.Intn(2)-1, 2*rand.Intn(2)-1
 		a := rand.Intn(maxAngle)
@@ -168,7 +168,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 	// some conditions e.g. all the rendering sources and targets are same.
 	// For more detail, see:
 	// https://pkg.go.dev/github.com/hajimehoshi/ebiten/v2#Image.DrawImage
-	w, h := ebitenImage.Size()
+	w, h := ebitenImage.Bounds().Dx(), ebitenImage.Bounds().Dy()
 	for i := 0; i < g.sprites.num; i++ {
 		s := g.sprites.sprites[i]
 		g.op.GeoM.Reset()
diff --git a/examples/subimage/main.go b/examples/subimage/main.go
index adb4c5490..90e287782 100644
--- a/examples/subimage/main.go
+++ b/examples/subimage/main.go
@@ -40,12 +40,13 @@ func (g *Game) Update() error {
 
 func (g *Game) Draw(screen *ebiten.Image) {
 	if g.offscreen == nil {
-		g.offscreen = ebiten.NewImage(screen.Size())
+		s := screen.Bounds().Size()
+		g.offscreen = ebiten.NewImage(s.X, s.Y)
 	}
 
 	// Use various sub-images as rendering destination.
 	// This is a proof-of-concept of efficient rendering with sub-images (#2232).
-	sw, sh := screen.Size()
+	sw, sh := screen.Bounds().Dx(), screen.Bounds().Dy()
 	cw := sw / cx
 	ch := sh / cy
 	for j := 0; j < cy; j++ {
diff --git a/examples/tiles/main.go b/examples/tiles/main.go
index fa58dce02..d5d538ac3 100644
--- a/examples/tiles/main.go
+++ b/examples/tiles/main.go
@@ -57,7 +57,7 @@ func (g *Game) Update() error {
 }
 
 func (g *Game) Draw(screen *ebiten.Image) {
-	w, _ := tilesImage.Size()
+	w := tilesImage.Bounds().Dx()
 	tileXCount := w / tileSize
 
 	// Draw each tile with each DrawImage call.
diff --git a/examples/touch/main.go b/examples/touch/main.go
index 9b6df382e..f05b835ca 100644
--- a/examples/touch/main.go
+++ b/examples/touch/main.go
@@ -213,7 +213,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 	op.GeoM.Translate(g.x, g.y)
 
 	// Center the image (corrected by the current zoom).
-	w, h := gophersImage.Size()
+	w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
 	op.GeoM.Translate(float64(-w)/2*g.zoom, float64(-h)/2*g.zoom)
 
 	screen.DrawImage(gophersImage, op)
diff --git a/examples/ui/main.go b/examples/ui/main.go
index f6b55404e..bbb8ad43a 100644
--- a/examples/ui/main.go
+++ b/examples/ui/main.go
@@ -340,7 +340,7 @@ func (t *TextBox) Draw(dst *ebiten.Image) {
 
 	if t.contentBuf != nil {
 		vw, vh := t.viewSize()
-		w, h := t.contentBuf.Size()
+		w, h := t.contentBuf.Bounds().Dx(), t.contentBuf.Bounds().Dy()
 		if vw > w || vh > h {
 			t.contentBuf.Dispose()
 			t.contentBuf = nil
diff --git a/examples/windowsize/main.go b/examples/windowsize/main.go
index a30e18c98..9e2c8e2ff 100644
--- a/examples/windowsize/main.go
+++ b/examples/windowsize/main.go
@@ -308,8 +308,8 @@ func (g *game) Update() error {
 }
 
 func (g *game) Draw(screen *ebiten.Image) {
-	w, h := gophersImage.Size()
-	w2, h2 := screen.Size()
+	w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
+	w2, h2 := screen.Bounds().Dx(), screen.Bounds().Dy()
 	op := &ebiten.DrawImageOptions{}
 	op.GeoM.Translate(float64(-w+w2)/2, float64(-h+h2)/2)
 	dx := math.Cos(2*math.Pi*float64(g.count)/360) * 20
diff --git a/gameforui.go b/gameforui.go
index f5c452c4e..76cff965a 100644
--- a/gameforui.go
+++ b/gameforui.go
@@ -193,7 +193,7 @@ func (g *gameForUI) DrawFinalScreen(scale, offsetX, offsetY float64) {
 		op := &DrawRectShaderOptions{}
 		op.Images[0] = g.offscreen
 		op.GeoM = geoM
-		w, h := g.offscreen.Size()
+		w, h := g.offscreen.Bounds().Dx(), g.offscreen.Bounds().Dy()
 		g.screen.DrawRectShader(w, h, g.screenShader, op)
 	}
 }
diff --git a/image.go b/image.go
index 0716007c4..df5158d1e 100644
--- a/image.go
+++ b/image.go
@@ -55,6 +55,8 @@ func (i *Image) copyCheck() {
 }
 
 // Size returns the size of the image.
+//
+// Deprecated: as of v2.5. Use Bounds().Dx() and Bounds().Dy() or Bounds().Size() instead.
 func (i *Image) Size() (width, height int) {
 	s := i.Bounds().Size()
 	return s.X, s.Y
@@ -606,7 +608,7 @@ func (i *Image) DrawTrianglesShader(vertices []Vertex, indices []uint16, shader
 	copy(is, indices)
 
 	var imgs [graphics.ShaderImageCount]*ui.Image
-	var imgw, imgh int
+	var imgSize image.Point
 	for i, img := range options.Images {
 		if img == nil {
 			continue
@@ -615,10 +617,10 @@ func (i *Image) DrawTrianglesShader(vertices []Vertex, indices []uint16, shader
 			panic("ebiten: the given image to DrawTrianglesShader must not be disposed")
 		}
 		if i == 0 {
-			imgw, imgh = img.Size()
+			imgSize = img.Bounds().Size()
 		} else {
 			// TODO: Check imgw > 0 && imgh > 0
-			if w, h := img.Size(); imgw != w || imgh != h {
+			if img.Bounds().Size() != imgSize {
 				panic("ebiten: all the source images must be the same size with the rectangle")
 			}
 		}
@@ -723,7 +725,7 @@ func (i *Image) DrawRectShader(width, height int, shader *Shader, options *DrawR
 		if img.isDisposed() {
 			panic("ebiten: the given image to DrawRectShader must not be disposed")
 		}
-		if w, h := img.Size(); width != w || height != h {
+		if img.Bounds().Size() != image.Pt(width, height) {
 			panic("ebiten: all the source images must be the same size with the rectangle")
 		}
 		imgs[i] = img.image
diff --git a/image_test.go b/image_test.go
index 458363871..75eef8294 100644
--- a/image_test.go
+++ b/image_test.go
@@ -103,7 +103,7 @@ func TestImagePixels(t *testing.T) {
 		t.Fatalf("img size: got %d; want %d", got, img.Bounds().Size())
 	}
 
-	w, h := img0.Bounds().Size().X, img0.Bounds().Size().Y
+	w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
 	// Check out of range part
 	w2, h2 := graphics.InternalImageSize(w), graphics.InternalImageSize(h)
 	for j := -100; j < h2+100; j++ {
@@ -141,7 +141,7 @@ func TestImageComposition(t *testing.T) {
 		return
 	}
 
-	w, h := img1.Bounds().Size().X, img1.Bounds().Size().Y
+	w, h := img1.Bounds().Dx(), img1.Bounds().Dy()
 
 	img2 := ebiten.NewImage(w, h)
 	img3 := ebiten.NewImage(w, h)
@@ -199,7 +199,7 @@ func TestImageScale(t *testing.T) {
 			t.Fatal(err)
 			return
 		}
-		w, h := img0.Size()
+		w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
 		img1 := ebiten.NewImage(w*scale, h*scale)
 		op := &ebiten.DrawImageOptions{}
 		op.GeoM.Scale(float64(scale), float64(scale))
@@ -224,7 +224,7 @@ func TestImage90DegreeRotate(t *testing.T) {
 		t.Fatal(err)
 		return
 	}
-	w, h := img0.Size()
+	w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
 	img1 := ebiten.NewImage(h, w)
 	op := &ebiten.DrawImageOptions{}
 	op.GeoM.Rotate(math.Pi / 2)
@@ -248,7 +248,7 @@ func TestImageDotByDotInversion(t *testing.T) {
 		t.Fatal(err)
 		return
 	}
-	w, h := img0.Size()
+	w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
 	img1 := ebiten.NewImage(w, h)
 	op := &ebiten.DrawImageOptions{}
 	op.GeoM.Rotate(math.Pi)
@@ -284,8 +284,8 @@ func TestImageWritePixels(t *testing.T) {
 	img0 := ebiten.NewImage(size.X, size.Y)
 
 	img0.WritePixels(img.Pix)
-	for j := 0; j < img0.Bounds().Size().Y; j++ {
-		for i := 0; i < img0.Bounds().Size().X; i++ {
+	for j := 0; j < img0.Bounds().Dy(); j++ {
+		for i := 0; i < img0.Bounds().Dx(); i++ {
 			got := img0.At(i, j)
 			want := img.At(i, j)
 			if got != want {
@@ -303,8 +303,8 @@ func TestImageWritePixels(t *testing.T) {
 	for i := range p {
 		p[i] = 0
 	}
-	for j := 0; j < img0.Bounds().Size().Y; j++ {
-		for i := 0; i < img0.Bounds().Size().X; i++ {
+	for j := 0; j < img0.Bounds().Dy(); j++ {
+		for i := 0; i < img0.Bounds().Dx(); i++ {
 			got := img0.At(i, j)
 			want := color.RGBA{0x80, 0x80, 0x80, 0x80}
 			if got != want {
@@ -354,14 +354,14 @@ func TestImageBlendLighter(t *testing.T) {
 		return
 	}
 
-	w, h := img0.Size()
+	w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
 	img1 := ebiten.NewImage(w, h)
 	img1.Fill(color.RGBA{0x01, 0x02, 0x03, 0x04})
 	op := &ebiten.DrawImageOptions{}
 	op.Blend = ebiten.BlendLighter
 	img1.DrawImage(img0, op)
-	for j := 0; j < img1.Bounds().Size().Y; j++ {
-		for i := 0; i < img1.Bounds().Size().X; i++ {
+	for j := 0; j < img1.Bounds().Dy(); j++ {
+		for i := 0; i < img1.Bounds().Dx(); i++ {
 			got := img1.At(i, j).(color.RGBA)
 			want := img0.At(i, j).(color.RGBA)
 			want.R = uint8(min(0xff, int(want.R)+1))
@@ -394,7 +394,7 @@ func TestNewImageFromSubImage(t *testing.T) {
 	subImg := img.(*image.NRGBA).SubImage(image.Rect(1, 1, w-1, h-1))
 	eimg := ebiten.NewImageFromImage(subImg)
 	sw, sh := subImg.Bounds().Dx(), subImg.Bounds().Dy()
-	w2, h2 := eimg.Size()
+	w2, h2 := eimg.Bounds().Dx(), eimg.Bounds().Dy()
 	if w2 != sw {
 		t.Errorf("eimg Width: got %v; want %v", w2, sw)
 	}
@@ -510,7 +510,7 @@ func TestImageEdge(t *testing.T) {
 			for _, a := range angles {
 				for _, testDrawTriangles := range []bool{false, true} {
 					img1.Clear()
-					w, h := img0.Size()
+					w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
 					b := img0.Bounds()
 					var geo ebiten.GeoM
 					geo.Translate(-float64(w)/2, -float64(h)/2)
@@ -741,7 +741,7 @@ func TestImageSize(t *testing.T) {
 		h = 31
 	)
 	img := ebiten.NewImage(w, h)
-	gotW, gotH := img.Size()
+	gotW, gotH := img.Bounds().Dx(), img.Bounds().Dy()
 	if gotW != w {
 		t.Errorf("got: %d, want: %d", gotW, w)
 	}
@@ -835,7 +835,7 @@ loop:
 		}
 		src.WritePixels(pix)
 
-		_, dh := dst.Size()
+		dh := dst.Bounds().Dy()
 		for i := 0; i < dh; {
 			dst.Clear()
 			op := &ebiten.DrawImageOptions{}
@@ -902,7 +902,7 @@ func Disabled_TestImageMipmap(t *testing.T) {
 		t.Fatal(err)
 		return
 	}
-	w, h := src.Size()
+	w, h := src.Bounds().Dx(), src.Bounds().Dy()
 
 	l1 := ebiten.NewImage(w/2, h/2)
 	op := &ebiten.DrawImageOptions{}
@@ -910,7 +910,7 @@ func Disabled_TestImageMipmap(t *testing.T) {
 	op.Filter = ebiten.FilterLinear
 	l1.DrawImage(src, op)
 
-	l1w, l1h := l1.Size()
+	l1w, l1h := l1.Bounds().Dx(), l1.Bounds().Dy()
 	l2 := ebiten.NewImage(l1w/2, l1h/2)
 	op = &ebiten.DrawImageOptions{}
 	op.GeoM.Scale(1/2.0, 1/2.0)
@@ -947,7 +947,7 @@ func Disabled_TestImageMipmapNegativeDet(t *testing.T) {
 		t.Fatal(err)
 		return
 	}
-	w, h := src.Size()
+	w, h := src.Bounds().Dx(), src.Bounds().Dy()
 
 	l1 := ebiten.NewImage(w/2, h/2)
 	op := &ebiten.DrawImageOptions{}
@@ -955,7 +955,7 @@ func Disabled_TestImageMipmapNegativeDet(t *testing.T) {
 	op.Filter = ebiten.FilterLinear
 	l1.DrawImage(src, op)
 
-	l1w, l1h := l1.Size()
+	l1w, l1h := l1.Bounds().Dx(), l1.Bounds().Dy()
 	l2 := ebiten.NewImage(l1w/2, l1h/2)
 	op = &ebiten.DrawImageOptions{}
 	op.GeoM.Scale(1/2.0, 1/2.0)
@@ -1091,7 +1091,7 @@ func TestImageMiamapAndDrawTriangle(t *testing.T) {
 	op.Filter = ebiten.FilterLinear
 	img0.DrawImage(img1, op)
 
-	w, h := img0.Size()
+	w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
 	for j := 0; j < h; j++ {
 		for i := 0; i < w; i++ {
 			c := img0.At(i, j).(color.RGBA)
@@ -1123,7 +1123,7 @@ func TestImageSubImageSize(t *testing.T) {
 	img := ebiten.NewImage(16, 16)
 	img.Fill(color.RGBA{0xff, 0, 0, 0xff})
 
-	got, _ := img.SubImage(image.Rect(1, 1, 16, 16)).(*ebiten.Image).Size()
+	got := img.SubImage(image.Rect(1, 1, 16, 16)).Bounds().Dx()
 	want := 15
 	if got != want {
 		t.Errorf("got: %v, want: %v", got, want)
diff --git a/internal/processtest/testdata/issue2154_1.go b/internal/processtest/testdata/issue2154_1.go
index 9073b2103..c35613496 100644
--- a/internal/processtest/testdata/issue2154_1.go
+++ b/internal/processtest/testdata/issue2154_1.go
@@ -65,7 +65,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 	screen.DrawImage(srcInit, nil)
 
 	if g.dst == nil {
-		g.dst = ebiten.NewImage(screen.Size())
+		g.dst = ebiten.NewImage(screen.Bounds().Dx(), screen.Bounds().Dy())
 		return
 	}
 
diff --git a/run.go b/run.go
index 8fe6e0ed5..aeeed81b5 100644
--- a/run.go
+++ b/run.go
@@ -96,7 +96,6 @@ type LayoutFer interface {
 // FinalScreen implements a part of Image functions.
 type FinalScreen interface {
 	Bounds() image.Rectangle
-	Size() (int, int)
 
 	DrawImage(img *Image, options *DrawImageOptions)
 	DrawTriangles(vertices []Vertex, indices []uint16, img *Image, options *DrawTrianglesOptions)
diff --git a/text/text_test.go b/text/text_test.go
index 3602c8e66..adfead0b5 100644
--- a/text/text_test.go
+++ b/text/text_test.go
@@ -37,7 +37,7 @@ func TestTextColor(t *testing.T) {
 	img := ebiten.NewImage(30, 30)
 	text.Draw(img, "Hello", bitmapfont.Face, 12, 12, clr)
 
-	w, h := img.Size()
+	w, h := img.Bounds().Dx(), img.Bounds().Dy()
 	allTransparent := true
 	for j := 0; j < h; j++ {
 		for i := 0; i < w; i++ {