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The iPhone 18 Pro and A4 Paper are most easily told apart by their overall size. On height, the A4 Paper measures 297.0 mm against the iPhone 18 Pro's 150.0 mm — about 147.0 mm more. On width, the A4 Paper measures 210.0 mm against the iPhone 18 Pro's 71.9 mm — about 138.1 mm more. On thickness, the iPhone 18 Pro measures 8.8 mm against the A4 Paper's 0.1 mm — about 8.7 mm more.
Only the iPhone 18 Pro lists a weight (211 g), so a direct comparison is not possible.
Fits in most pockets, may feel snug when sitting.
Most of the screen is reachable, shifting grip needed for corners.
| Metric | iPhone 18 Pro | A4 Paper | Diff |
|---|---|---|---|
| Width | 71.9 mm | 210.0 mm | -138.1 mm |
| Height | 150.0 mm | 297.0 mm | -147.0 mm |
| Depth | 8.8 mm | 0.1 mm | +8.7 mm |
| Weight | 211 g | N/A | - |