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The iPhone 18 Pro Max and Samsung Galaxy S24 Ultra are most easily told apart by their overall size. On height, the iPhone 18 Pro Max measures 163.4 mm against the Samsung Galaxy S24 Ultra's 162.3 mm — about 1.1 mm more. On width, the Samsung Galaxy S24 Ultra measures 79.0 mm against the iPhone 18 Pro Max's 78.0 mm — about 1.0 mm more. They match almost exactly in thickness, at 8.8 mm.
The iPhone 18 Pro Max is the heavier of the two at 249 g, compared with 232 g for the Samsung Galaxy S24 Ultra. That is a 17 g difference (7%). 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.
Best used with two hands for full screen access.
| Metric | iPhone 18 Pro Max | Samsung Galaxy S24 Ultra | Diff |
|---|---|---|---|
| Width | 78.0 mm | 79.0 mm | -1.0 mm |
| Height | 163.4 mm | 162.3 mm | +1.1 mm |
| Depth | 8.8 mm | 8.6 mm | +0.2 mm |
| Weight | 249 g | 232 g | +17 g |