When placed side by side, the iPhone 17 and Apple Watch Ultra 3 reveal a clear story. In terms of height, the iPhone 17 stands at 147.6 mm while the Apple Watch Ultra 3 measures 49.0 mm. The iPhone 17 is 98.6 mm taller. Looking at width, the iPhone 17 is 71.6 mm across versus the Apple Watch Ultra 3's 44.0 mm. The iPhone 17 is 27.6 mm wider. For thickness, the iPhone 17 comes in at 7.8 mm compared to the Apple Watch Ultra 3's 14.4 mm. The Apple Watch Ultra 3 is 6.6 mm thicker.
The iPhone 17 is heavier at 171 grams versus 61.4 grams for the Apple Watch Ultra 3. That is a 109.6-gram difference (178.5%). While this may seem small, you can feel a noticeable difference during extended use.
Fits comfortably in most front pockets.
Most of the screen is reachable, shifting grip needed for corners.
| Metric | iPhone 17 | Apple Watch Ultra 3 | Diff |
|---|---|---|---|
| Width | 71.6 mm | 44.0 mm | +27.6 mm |
| Height | 147.6 mm | 49.0 mm | +98.6 mm |
| Depth | 7.8 mm | 14.4 mm | -6.6 mm |
| Weight | 171 g | 61.4 g | +109.6 mm |