OnePlus 9 vs Galaxy A51: Size & Dimensions Compared
The OnePlus 9 is the larger phone, measuring 1.5mm taller and 0.6mm wider.
Visual Size Overlay
- •Camera module layout is different — cutout won't align
Same screen size (6.5") but body width differs by 0.6mm — verify bezel alignment before buying.
| Dimension | OnePlus 9 | Galaxy A51 | Difference |
|---|---|---|---|
| Height | 160mm | 158.5mm | Galaxy A51 -1.5mm (shorter) |
| Width | 74.2mm | 73.6mm | Galaxy A51 -0.6mm (narrower) |
| Thickness | 8.7mm | 7.9mm | Galaxy A51 -0.8mm (thinner) |
| Weight | 192g | 172g | Galaxy A51 -20.0g (lighter) |
| Screen | 6.55" | 6.5" | 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 | OnePlus 9 | Galaxy A51 |
|---|---|---|
| Wireless Charging | 10W | No |
| 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 OnePlus 9 to Galaxy A51?
Different sizes mean your old case probably won't fit. You'll need a new one.
Accessories for OnePlus 9
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Frequently Asked Questions
Is OnePlus 9 bigger than Galaxy A51?
Yes, the OnePlus 9 is 1.5mm taller and 0.6mm wider. The OnePlus 9 weighs 192g vs 172g.
Are OnePlus 9 and Galaxy A51 the same size?
No, the height differs by 1.5mm, width by 0.6mm, and thickness by 0.8mm.