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The Apple Watch Ultra 3 and A4 Paper are most easily told apart by their overall size. On height, the A4 Paper measures 297.0 mm against the Apple Watch Ultra 3's 49.0 mm — about 248.0 mm more. On width, the A4 Paper measures 210.0 mm against the Apple Watch Ultra 3's 44.0 mm — about 166.0 mm more. On thickness, the Apple Watch Ultra 3 measures 14.4 mm against the A4 Paper's 0.1 mm — about 14.3 mm more.
Only the Apple Watch Ultra 3 lists a weight (61.4 g), so a direct comparison is not possible.
| Metric | Apple Watch Ultra 3 | A4 Paper | Diff |
|---|---|---|---|
| Width | 44.0 mm | 210.0 mm | -166.0 mm |
| Height | 49.0 mm | 297.0 mm | -248.0 mm |
| Depth | 14.4 mm | 0.1 mm | +14.3 mm |
| Weight | 61.4 g | N/A | - |