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Pixel 9a vs Pixel 4: Size & Dimensions Compared

The Pixel 9a is the larger phone, measuring 7.6mm taller and 4.5mm wider.

Visual Size Overlay

Pixel 9aPixel 4
154.7mm147.1mm+7.6mm73.3mm68.8mm+4.5mm10mm
Height Δ
+7.6mm
Width Δ
+4.5mm
Thickness Δ
+0.7mm
Case CompatibilityWon't Fit
  • Camera module layout is different — cutout won't align
Screen ProtectorNot Compatible

Screen sizes differ (6.3" vs 5.7") — protector won't fit.

DimensionPixel 9aPixel 4Difference
Height154.7mm147.1mmPixel 4 -7.6mm (shorter)
Width73.3mm68.8mmPixel 4 -4.5mm (narrower)
Thickness8.9mm8.2mmPixel 4 -0.7mm (thinner)
Weight186g162gPixel 4 -24.0g (lighter)
Screen6.3"5.7"Pixel 4 -0.6" (smaller)

Visual Size Comparison

HeightPixel 9a +7.6mm
Pixel 9a
154.7mm
Pixel 4
147.1mm
WidthPixel 9a +4.5mm
Pixel 9a
73.3mm
Pixel 4
68.8mm
ThicknessPixel 9a +0.7mm
Pixel 9a
8.9mm
Pixel 4
8.2mm

Button & Port Layout

Which is bigger?

The Pixel 9a is the taller phone at 154.7mm (vs 147.1mm). It is also 24g heavier.

Wireless Charging & MagSafe Compatibility

Wireless chargers work with both phones, but magnetic snap varies.

  • Both devices support wireless charging. Standard Qi/Qi2 chargers work with either phone.
SpecPixel 9aPixel 4
Wireless Charging15W12W
Qi VersionQiQi
MagSafeNoNo
Built-in MagnetsNoNo

MagSafe cases are NOT cross-compatible between these devices — the case body is shaped to each phone, even though the internal magnet ring may be the same.

Upgrading from Pixel 9a to Pixel 4?

Different sizes mean your old case probably won't fit. You'll need a new one.

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Frequently Asked Questions

Is Pixel 9a bigger than Pixel 4?

Yes, the Pixel 9a is 7.6mm taller and 4.5mm wider. The Pixel 9a weighs 186g vs 162g.

Are Pixel 9a and Pixel 4 the same size?

No, the height differs by 7.6mm, width by 4.5mm, and thickness by 0.7mm.