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The iPhone 15 Pro Max and iPhone 18 Pro are most easily told apart by their overall size. On height, the iPhone 15 Pro Max measures 159.9 mm against the iPhone 18 Pro's 150.0 mm — about 9.9 mm more. On width, the iPhone 15 Pro Max measures 76.7 mm against the iPhone 18 Pro's 71.9 mm — about 4.8 mm more. On thickness, the iPhone 18 Pro measures 8.8 mm against the iPhone 15 Pro Max's 8.3 mm — about 0.5 mm more.
The iPhone 15 Pro Max is the heavier of the two at 221 g, compared with 211 g for the iPhone 18 Pro. That is a 10 g difference (5%). The gap is small enough that you would barely notice it day to day.
Fits in most pockets, may feel snug when sitting.
Most of the screen is reachable, shifting grip needed for corners.
Fits in most pockets, may feel snug when sitting.
Most of the screen is reachable, shifting grip needed for corners.
| Metric | iPhone 15 Pro Max | iPhone 18 Pro | Diff |
|---|---|---|---|
| Width | 76.7 mm | 71.9 mm | +4.8 mm |
| Height | 159.9 mm | 150.0 mm | +9.9 mm |
| Depth | 8.3 mm | 8.8 mm | -0.5 mm |
| Weight | 221 g | 211 g | +10 g |