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No, your Pixel 9a case won't fit the Galaxy S21 Ultra

The Pixel 9a (154.7×73.3mm) and Galaxy S21 Ultra (165.1×75.6mm) differ too much for cases to be compatible.

Does a Pixel 9a Case Fit Galaxy S21 Ultra?

Q: What's different between Pixel 9a and Galaxy S21 Ultra dimensions?

The Pixel 9a is 154.7mm tall and 73.3mm wide, while the Galaxy S21 Ultra is 165.1mm tall and 75.6mm wide. Camera module layout is different — cutout won't align

Last verified: March 2026

No, a Pixel 9a case will not fit the Galaxy S21 Ultra. The phones have different dimensions that make cases incompatible.

0Won't Fit

Your Pixel 9a case will NOT fit the Galaxy S21 Ultra. Here's why:

•Camera module layout is different — cutout won't align

Spec	Pixel 9a	Galaxy S21 Ultra	Diff
Height	154.7mm	165.1mm	Galaxy S21 Ultra +10.4mm
Width	73.3mm	75.6mm	Galaxy S21 Ultra +2.3mm
Thickness	8.9mm	8.9mm	Same
Camera Layout	island-dual	vertical-quad	Different
Port	usb-c	usb-c	Same

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Your Pixel 9a case won't fit the Galaxy S21 Ultra. Find the right case:

🛡️Best Galaxy S21 Ultra Cases→🔒Rugged Cases for Galaxy S21 Ultra→✨Clear Cases for Galaxy S21 Ultra→👛Wallet Cases for Galaxy S21 Ultra→

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Size Comparison

Pixel 9aGalaxy S21 Ultra

Wireless Charging & MagSafe

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

Both devices support wireless charging. Standard Qi/Qi2 chargers work with either phone.

Pixel 9a

Qi only

15W max

Galaxy S21 Ultra

Qi only

15W max

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.

See all cases for Galaxy S21 Ultra →

🎁 Buying a case as a gift? Use our Gift Finder →⚡ Need a charger for your Galaxy S21 Ultra? Check charger compatibility →

Does the screen protector fit? Pixel 9a → Galaxy S21 Ultra Compare sizes: Pixel 9a vs Galaxy S21 Ultra

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Frequently Asked Questions

Are Pixel 9a and Galaxy S21 Ultra the same size?

Pixel 9a measures 154.7×73.3×8.9mm while Galaxy S21 Ultra measures 165.1×75.6×8.9mm. They are different sizes.

Can I use a Pixel 9a screen protector on Galaxy S21 Ultra?

Edge types differ (flat vs curved) — screen protector won't adhere properly.

What's different between Pixel 9a and Galaxy S21 Ultra dimensions?

The height differs by 10.4mm, the width by 2.3mm, and thickness by 0.0mm. The camera module layout is also different.

Do I need a new case for Galaxy S21 Ultra?

Yes, you'll need a new case. The Galaxy S21 Ultra has different dimensions than the Pixel 9a, so cases are not interchangeable.

Will Pixel 9a accessories work with Galaxy S21 Ultra?

Chargers and cables are compatible since both phones use the same usb-c port. Both support wireless charging, so wireless chargers work with either phone. Cases and screen protectors depend on exact dimensions — check our compatibility results above.

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