No, your Galaxy S25 FE case won't fit the Galaxy S21
The Galaxy S25 FE (161.3×76.6mm) and Galaxy S21 (151.7×71.2mm) differ too much for cases to be compatible.
Does a Galaxy S25 FE Case Fit Galaxy S21?
Last verified: March 2026
No, a Galaxy S25 FE case will not fit the Galaxy S21. The phones have different dimensions that make cases incompatible.
Your Galaxy S25 FE case will NOT fit the Galaxy S21. 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 S25 FE | Galaxy S21 | Diff |
|---|---|---|---|
| Height | 161.3mm | 151.7mm | Galaxy S25 FE +9.6mm |
| Width | 76.6mm | 71.2mm | Galaxy S25 FE +5.4mm |
| Thickness | 7.4mm | 7.9mm | Galaxy S21 +0.5mm |
| Camera Layout | vertical-triple | vertical-triple | Same |
| Port | usb-c | usb-c | Same |
Your Galaxy S25 FE case won't fit the Galaxy S21. Find the right case:
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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 S25 FE
Qi only
15W max
Galaxy S21
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.
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Frequently Asked Questions
Are Galaxy S25 FE and Galaxy S21 the same size?
Galaxy S25 FE measures 161.3×76.6×7.4mm while Galaxy S21 measures 151.7×71.2×7.9mm. They are different sizes.
Can I use a Galaxy S25 FE screen protector on Galaxy S21?
Screen sizes differ (6.7" vs 6.2") — protector won't fit.
What's different between Galaxy S25 FE and Galaxy S21 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 S21?
Yes, you'll need a new case. The Galaxy S21 has different dimensions than the Galaxy S25 FE, so cases are not interchangeable.
Will Galaxy S25 FE accessories work with Galaxy S21?
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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