Galaxy S25 FE vs Galaxy S21 Ultra: Size & Dimensions Compared
The Galaxy S21 Ultra is the larger phone, measuring 3.8mm shorter and 1.0mm wider.
Visual Size Overlay
- •Camera module layout is different — cutout won't align
Edge types differ (flat vs curved) — screen protector won't adhere properly.
| Dimension | Galaxy S25 FE | Galaxy S21 Ultra | Difference |
|---|---|---|---|
| Height | 161.3mm | 165.1mm | Galaxy S21 Ultra +3.8mm (taller) |
| Width | 76.6mm | 75.6mm | Galaxy S21 Ultra -1.0mm (narrower) |
| Thickness | 7.4mm | 8.9mm | Galaxy S21 Ultra +1.5mm (thicker) |
| Weight | 190g | 227g | Galaxy S21 Ultra +37.0g (heavier) |
| Screen | 6.7" | 6.8" | Galaxy S21 Ultra +0.1" (larger) |
Visual Size Comparison
Button & Port Layout
Which is bigger?
The Galaxy S21 Ultra is the taller phone at 165.1mm (vs 161.3mm). It is also 37g heavier.
Wireless Charging & MagSafe Compatibility
Wireless chargers work with both phones, but magnetic snap varies.
- ✓Both devices support wireless charging. Standard Qi/Qi2 chargers work with either phone.
| Spec | Galaxy S25 FE | Galaxy S21 Ultra |
|---|---|---|
| Wireless Charging | 15W | 15W |
| Qi Version | Qi | Qi |
| MagSafe | No | No |
| Built-in Magnets | No | No |
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.
Upgrading from Galaxy S25 FE to Galaxy S21 Ultra?
Different sizes mean your old case probably won't fit. You'll need a new one.
Accessories for Galaxy S25 FE
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Frequently Asked Questions
Is Galaxy S25 FE bigger than Galaxy S21 Ultra?
No, the Galaxy S21 Ultra is 3.8mm taller. The Galaxy S25 FE weighs 190g vs 227g.
Are Galaxy S25 FE and Galaxy S21 Ultra the same size?
No, the height differs by 3.8mm, width by 1.0mm, and thickness by 1.5mm.