When placed side by side, the iPhone 17 Pro and Apple Watch Ultra 3 reveal a clear story. In terms of height, the iPhone 17 Pro stands at 149.6 mm while the Apple Watch Ultra 3 measures 49.0 mm. The iPhone 17 Pro is 100.6 mm taller. Looking at width, the iPhone 17 Pro is 71.5 mm across versus the Apple Watch Ultra 3's 44.0 mm. The iPhone 17 Pro is 27.5 mm wider. For thickness, the iPhone 17 Pro comes in at 8.3 mm compared to the Apple Watch Ultra 3's 14.4 mm. The Apple Watch Ultra 3 is 6.2 mm thicker.
The iPhone 17 Pro is heavier at 199 grams versus 61.4 grams for the Apple Watch Ultra 3. That is a 137.6-gram difference (224.1%). 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 Pro | Apple Watch Ultra 3 | Diff |
|---|---|---|---|
| Width | 71.5 mm | 44.0 mm | +27.5 mm |
| Height | 149.6 mm | 49.0 mm | +100.6 mm |
| Depth | 8.3 mm | 14.4 mm | -6.2 mm |
| Weight | 199 g | 61.4 g | +137.6 mm |