Galaxy S21 vs Galaxy S23: Size & Dimensions Compared
The Galaxy S21 is the larger phone, measuring 5.4mm taller and 0.3mm wider.
Visual Size Overlay
- •Height differs by 5.4mm — case won't fit
- •Thickness differs by 0.3mm — may affect fit
- •Camera bump size slightly different
Screen sizes are close (6.2" vs 6.1") but may not align perfectly.
| Dimension | Galaxy S21 | Galaxy S23 | Difference |
|---|---|---|---|
| Height | 151.7mm | 146.3mm | Galaxy S23 -5.4mm (shorter) |
| Width | 71.2mm | 70.9mm | Galaxy S23 -0.3mm (narrower) |
| Thickness | 7.9mm | 7.6mm | Galaxy S23 -0.3mm (thinner) |
| Weight | 169g | 168g | Galaxy S23 -1.0g (lighter) |
| Screen | 6.2" | 6.1" | Galaxy S23 -0.1" (smaller) |
Visual Size Comparison
Button & Port Layout
Which is bigger?
The Galaxy S21 is the taller phone at 151.7mm (vs 146.3mm). It is also 1g 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 S21 | Galaxy S23 |
|---|---|---|
| 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 S21 to Galaxy S23?
Different sizes mean your old case probably won't fit. You'll need a new one.
Accessories for Galaxy S21
Accessories for Galaxy S23
Spigen
Spigen Rugged Armor for Galaxy S23
$15.99
Spigen
Spigen Liquid Air for Galaxy S23
$13.99
Caseology
Caseology Parallax for Galaxy S23
$16.99
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Frequently Asked Questions
Is Galaxy S21 bigger than Galaxy S23?
Yes, the Galaxy S21 is 5.4mm taller and 0.3mm wider. The Galaxy S21 weighs 169g vs 168g.
Are Galaxy S21 and Galaxy S23 the same size?
No, the height differs by 5.4mm, width by 0.3mm, and thickness by 0.3mm.