Galaxy A51 vs OnePlus 9: Size & Dimensions Compared
The OnePlus 9 is the larger phone, measuring 1.5mm shorter and 0.6mm narrower.
Visual Size Overlay
- •Camera module layout is different — cutout won't align
Same screen size (6.55") but body width differs by 0.6mm — verify bezel alignment before buying.
| Dimension | Galaxy A51 | OnePlus 9 | Difference |
|---|---|---|---|
| Height | 158.5mm | 160mm | OnePlus 9 +1.5mm (taller) |
| Width | 73.6mm | 74.2mm | OnePlus 9 +0.6mm (wider) |
| Thickness | 7.9mm | 8.7mm | OnePlus 9 +0.8mm (thicker) |
| Weight | 172g | 192g | OnePlus 9 +20.0g (heavier) |
| Screen | 6.5" | 6.55" | Same |
Visual Size Comparison
Button & Port Layout
Which is bigger?
The OnePlus 9 is the taller phone at 160mm (vs 158.5mm). It is also 20g heavier.
Wireless Charging & MagSafe Compatibility
Only one phone supports wireless charging.
- ⚠The Galaxy A51 does not support wireless charging. Only the OnePlus 9 can use a wireless charger.
| Spec | Galaxy A51 | OnePlus 9 |
|---|---|---|
| Wireless Charging | No | 10W |
| Qi Version | — | 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 A51 to OnePlus 9?
Different sizes mean your old case probably won't fit. You'll need a new one.
Accessories for Galaxy A51
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Frequently Asked Questions
Is Galaxy A51 bigger than OnePlus 9?
No, the OnePlus 9 is 1.5mm taller. The Galaxy A51 weighs 172g vs 192g.
Are Galaxy A51 and OnePlus 9 the same size?
No, the height differs by 1.5mm, width by 0.6mm, and thickness by 0.8mm.