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No, your Honor X9b case won't fit the Galaxy S21 Ultra

The Honor X9b (163.6×75.5mm) and Galaxy S21 Ultra (165.1×75.6mm) differ too much for cases to be compatible.

Does a Honor X9b Case Fit Galaxy S21 Ultra?

Last verified: March 2026

No, a Honor X9b case will not fit the Galaxy S21 Ultra. The phones have different dimensions that make cases incompatible.

0Won't Fit

Your Honor X9b case will NOT fit the Galaxy S21 Ultra. Here's why:

  • •Camera module layout is different — cutout won't align
SpecHonor X9bGalaxy S21 UltraDiff
Height163.6mm165.1mmGalaxy S21 Ultra +1.5mm
Width75.5mm75.6mmGalaxy S21 Ultra +0.1mm
Thickness8mm8.9mmGalaxy S21 Ultra +0.9mm
Camera Layoutcircular-triplevertical-quadDifferent
Portusb-cusb-cSame
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Your Honor X9b 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

10mm
Honor X9bGalaxy S21 Ultra

Wireless Charging & MagSafe

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Only one phone supports wireless charging.

  • The Honor X9b does not support wireless charging. Only the Galaxy S21 Ultra can use a wireless charger.

Honor X9b

No wireless

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? Honor X9b → Galaxy S21 UltraCompare sizes: Honor X9b vs Galaxy S21 Ultra

Related Guides

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Frequently Asked Questions

Are Honor X9b and Galaxy S21 Ultra the same size?

Honor X9b measures 163.6×75.5×8mm while Galaxy S21 Ultra measures 165.1×75.6×8.9mm. They are different sizes.

Can I use a Honor X9b screen protector on Galaxy S21 Ultra?

Same screen size (6.8") with minimal width difference — should fit.

What's different between Honor X9b and Galaxy S21 Ultra dimensions?

The height differs by 1.5mm, the width by 0.1mm, and thickness by 0.9mm. 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 Honor X9b, so cases are not interchangeable.

Will Honor X9b accessories work with Galaxy S21 Ultra?

Chargers and cables are compatible since both phones use the same usb-c port. Cases and screen protectors depend on exact dimensions — check our compatibility results above.

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