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The iPhone 17 Pro Max and iPhone 18 Pro Max share nearly identical dimensions — the practical difference comes down to weight, materials, or other specs rather than size. They match almost exactly in height, at 163.4 mm. They match almost exactly in width, at 78.0 mm. They match almost exactly in thickness, at 8.8 mm.
Both weigh the same at 233 g.
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 17 Pro Max | iPhone 18 Pro Max | Diff |
|---|---|---|---|
| Width | 78.0 mm | 78.0 mm | 0.0 mm |
| Height | 163.4 mm | 163.4 mm | 0.0 mm |
| Depth | 8.8 mm | 8.8 mm | 0.0 mm |
| Weight | 233 g | 233 g | 0 g |