No, your Galaxy S21 Ultra case won't fit the Galaxy S23 Ultra
The Galaxy S21 Ultra (165.1×75.6mm) and Galaxy S23 Ultra (163.4×78.1mm) differ too much for cases to be compatible.
Does a Galaxy S21 Ultra Case Fit Galaxy S23 Ultra?
No, a Galaxy S21 Ultra case will not fit the Galaxy S23 Ultra. The phones have different dimensions that make cases incompatible.
Your Galaxy S21 Ultra case will NOT fit the Galaxy S23 Ultra. Here's why:
- •Height difference too large — case won't fit
- •Width difference too large — case won't fit
- •Camera bump size slightly different
- •Button placement differs — cutouts may not align
| Spec | Galaxy S21 Ultra | Galaxy S23 Ultra | Diff |
|---|---|---|---|
| Height | 165.1mm | 163.4mm | +1.7mm |
| Width | 75.6mm | 78.1mm | +2.5mm |
| Thickness | 8.9mm | 8.9mm | 0 |
| Camera Layout | vertical-quad | vertical-quad | Same |
| Port | usb-c | usb-c | Same |
Since your Galaxy S21 Ultra case won't work with the Galaxy S23 Ultra, here are the highest-rated cases that will:
OtterBox
OtterBox Defender Series for Galaxy S23 Ultra
$64.95
TORRAS
TORRAS MarsClimber for Galaxy S23 Ultra
$19.99
Caseology
Caseology Nano Pop for Galaxy S23 Ultra
$15.99
As an Amazon Associate, WillItSnap earns from qualifying purchases. This doesn't affect our compatibility data.
Get alerts when we add more phones
Related Guides
Related Compatibility Checks
Frequently Asked Questions
Are Galaxy S21 Ultra and Galaxy S23 Ultra the same size?
Galaxy S21 Ultra measures 165.1×75.6×8.9mm while Galaxy S23 Ultra measures 163.4×78.1×8.9mm. They are different sizes.
Can I use a Galaxy S21 Ultra screen protector on Galaxy S23 Ultra?
Due to size differences, we recommend getting a screen protector specifically made for the Galaxy S23 Ultra.
What's different between Galaxy S21 Ultra and Galaxy S23 Ultra dimensions?
The height differs by 1.7mm, the width by 2.5mm, and thickness by 0.0mm.
Want to check another phone?
← Back to the compatibility checker