Galaxy S21 Ultra vs OnePlus 13: Size & Dimensions Compared
The Galaxy S21 Ultra is the larger phone, measuring 2.2mm taller and 0.9mm narrower.
Visual Size Overlay
- •Camera module layout is different — cutout won't align
Edge types differ (curved vs flat) — screen protector won't adhere properly.
| Dimension | Galaxy S21 Ultra | OnePlus 13 | Difference |
|---|---|---|---|
| Height | 165.1mm | 162.9mm | OnePlus 13 -2.2mm (shorter) |
| Width | 75.6mm | 76.5mm | OnePlus 13 +0.9mm (wider) |
| Thickness | 8.9mm | 8.5mm | OnePlus 13 -0.4mm (thinner) |
| Weight | 227g | 213g | OnePlus 13 -14.0g (lighter) |
| Screen | 6.8" | 6.82" | Same |
Visual Size Comparison
Button & Port Layout
Which is bigger?
The Galaxy S21 Ultra is the taller phone at 165.1mm (vs 162.9mm). It is also 14g 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 Ultra | OnePlus 13 |
|---|---|---|
| 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 Ultra to OnePlus 13?
Different sizes mean your old case probably won't fit. You'll need a new one.
Accessories for Galaxy S21 Ultra
Accessories for OnePlus 13
Spigen
Spigen Ultra Hybrid for OnePlus 13
$15.99
Ringke
Ringke Fusion-X MagSafe for OnePlus 13
$23.99
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Frequently Asked Questions
Is Galaxy S21 Ultra bigger than OnePlus 13?
Yes, the Galaxy S21 Ultra is 2.2mm taller and 0.9mm narrower. The Galaxy S21 Ultra weighs 227g vs 213g.
Are Galaxy S21 Ultra and OnePlus 13 the same size?
No, the height differs by 2.2mm, width by 0.9mm, and thickness by 0.4mm.