No, your Galaxy S21 case won't fit the Galaxy S25 FE
The Galaxy S21 (151.7×71.2mm) and Galaxy S25 FE (161.3×76.6mm) differ too much for cases to be compatible.
Does a Galaxy S21 Case Fit Galaxy S25 FE?
Last verified: March 2026
No, a Galaxy S21 case will not fit the Galaxy S25 FE. The phones have different dimensions that make cases incompatible.
Your Galaxy S21 case will NOT fit the Galaxy S25 FE. Here's why:
- •Height differs by 9.6mm — case won't fit
- •Width differs by 5.4mm — case won't fit
- •Thickness differs by 0.5mm — may affect fit
- •Camera bump size differs significantly
- •Camera bump protrusion differs by 2.0mm — case lip may not protect camera
| Spec | Galaxy S21 | Galaxy S25 FE | Diff |
|---|---|---|---|
| Height | 151.7mm | 161.3mm | Galaxy S25 FE +9.6mm |
| Width | 71.2mm | 76.6mm | Galaxy S25 FE +5.4mm |
| Thickness | 7.9mm | 7.4mm | Galaxy S21 +0.5mm |
| Camera Layout | vertical-triple | vertical-triple | Same |
| Port | usb-c | usb-c | Same |
Your Galaxy S21 case won't fit the Galaxy S25 FE. Find the right case:
As an Amazon Associate, WillItSnap earns from qualifying purchases. This doesn't affect our compatibility data.
Get alerts when we add more phones
Size Comparison
Wireless Charging & MagSafe
Wireless chargers work with both phones, but magnetic snap varies.
- Both devices support wireless charging. Standard Qi/Qi2 chargers work with either phone.
Galaxy S21
Qi only
15W max
Galaxy S25 FE
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.
Related Guides
Related Compatibility Checks
Frequently Asked Questions
Are Galaxy S21 and Galaxy S25 FE the same size?
Galaxy S21 measures 151.7×71.2×7.9mm while Galaxy S25 FE measures 161.3×76.6×7.4mm. They are different sizes.
Can I use a Galaxy S21 screen protector on Galaxy S25 FE?
Screen sizes differ (6.2" vs 6.7") — protector won't fit.
What's different between Galaxy S21 and Galaxy S25 FE dimensions?
The height differs by 9.6mm, the width by 5.4mm, and thickness by 0.5mm.
Do I need a new case for Galaxy S25 FE?
Yes, you'll need a new case. The Galaxy S25 FE has different dimensions than the Galaxy S21, so cases are not interchangeable.
Will Galaxy S21 accessories work with Galaxy S25 FE?
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.
Want to check another phone?
← Back to the compatibility checker