When placed side by side, the Apple Watch Series 11 (45mm) and Apple Watch Ultra 3 reveal a clear story. In terms of height, the Apple Watch Series 11 (45mm) stands at 47.0 mm while the Apple Watch Ultra 3 measures 49.0 mm. The Apple Watch Ultra 3 is 2.0 mm taller. Looking at width, the Apple Watch Series 11 (45mm) is 39.6 mm across versus the Apple Watch Ultra 3's 44.0 mm. The Apple Watch Ultra 3 is 4.4 mm wider. For thickness, the Apple Watch Series 11 (45mm) comes in at 10.8 mm compared to the Apple Watch Ultra 3's 14.4 mm. The Apple Watch Ultra 3 is 3.6 mm thicker.
The Apple Watch Ultra 3 is heavier at 61.4 grams versus 39 grams for the Apple Watch Series 11 (45mm). That is a 22.4-gram difference (57.4%). While this may seem small, you can feel a noticeable difference during extended use.
| Metric | Apple Watch Series 11 (45mm) | Apple Watch Ultra 3 | Diff |
|---|---|---|---|
| Width | 39.6 mm | 44.0 mm | -4.4 mm |
| Height | 47.0 mm | 49.0 mm | -2.0 mm |
| Depth | 10.8 mm | 14.4 mm | -3.6 mm |
| Weight | 39 g | 61.4 g | -22.4 mm |