Pixel 9a vs Galaxy S21 Ultra: Size & Dimensions Compared
The Galaxy S21 Ultra is the larger phone, measuring 10.4mm shorter and 2.3mm narrower.
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 | Pixel 9a | Galaxy S21 Ultra | Difference |
|---|---|---|---|
| Height | 154.7mm | 165.1mm | Galaxy S21 Ultra +10.4mm (taller) |
| Width | 73.3mm | 75.6mm | Galaxy S21 Ultra +2.3mm (wider) |
| Thickness | 8.9mm | 8.9mm | Same |
| Weight | 186g | 227g | Galaxy S21 Ultra +41.0g (heavier) |
| Screen | 6.3" | 6.8" | Galaxy S21 Ultra +0.5" (larger) |
Visual Size Comparison
Button & Port Layout
Which is bigger?
The Galaxy S21 Ultra is the taller phone at 165.1mm (vs 154.7mm). It is also 41g 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 | Pixel 9a | 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 Pixel 9a to Galaxy S21 Ultra?
Different sizes mean your old case probably won't fit. You'll need a new one.
Accessories for Pixel 9a
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Frequently Asked Questions
Is Pixel 9a bigger than Galaxy S21 Ultra?
No, the Galaxy S21 Ultra is 10.4mm taller. The Pixel 9a weighs 186g vs 227g.
Are Pixel 9a and Galaxy S21 Ultra the same size?
No, the height differs by 10.4mm, width by 2.3mm, and thickness by 0.0mm.