When placed side by side, the Apple Watch Series 10 (46mm) and Apple Watch Ultra 3 reveal a clear story. In terms of height, the Apple Watch Series 10 (46mm) stands at 46.0 mm while the Apple Watch Ultra 3 measures 49.0 mm. The Apple Watch Ultra 3 is 3.0 mm taller. Looking at width, the Apple Watch Series 10 (46mm) is 39.4 mm across versus the Apple Watch Ultra 3's 44.0 mm. The Apple Watch Ultra 3 is 4.6 mm wider. For thickness, the Apple Watch Series 10 (46mm) comes in at 9.7 mm compared to the Apple Watch Ultra 3's 14.4 mm. The Apple Watch Ultra 3 is 4.7 mm thicker.
The Apple Watch Ultra 3 is heavier at 61.4 grams versus 34.2 grams for the Apple Watch Series 10 (46mm). That is a 27.199999999999996-gram difference (79.5%). While this may seem small, you can feel a noticeable difference during extended use.
| Metric | Apple Watch Series 10 (46mm) | Apple Watch Ultra 3 | Diff |
|---|---|---|---|
| Width | 39.4 mm | 44.0 mm | -4.6 mm |
| Height | 46.0 mm | 49.0 mm | -3.0 mm |
| Depth | 9.7 mm | 14.4 mm | -4.7 mm |
| Weight | 34.2 g | 61.4 g | -27.2 mm |