iPhone 18 Pro Max vs iPhone 17 Pro Max size
The iPhone 18 Pro Max measures 163.4 x 78 x 8.75 mm and the iPhone 17 Pro Max measures 163.4 x 78 x 8.75 mm. The iPhone 18 Pro Max and iPhone 17 Pro Max take up almost exactly the same space in your hand.
- iPhone 18 Pro Max249 g163.4 x 78 x 8.8 mm
- iPhone 17 Pro Max233 g163.4 x 78 x 8.8 mm
Outlines are drawn from published dimensions. Screen and camera shapes are simplified.
How the iPhone 18 Pro Max measures up
| Spec | iPhone 18 Pro Max | iPhone 17 Pro Max | Difference |
|---|---|---|---|
| Height | 163.4 mm 6.43 in | 163.4 mm 6.43 in | Same |
| Width | 78 mm 3.07 in | 78 mm 3.07 in | Same |
| Thickness | 8.75 mm 0.34 in | 8.75 mm 0.34 in | Same |
| Weight | 249 g 8.8 oz | 233 g 8.2 oz | +16 g (+6.9%) |
| Screen | 6.9 in | 6.9 in | Same |
| Front footprint | 127.5 cm² | 127.5 cm² | Same |
What the difference feels like
The two are within a fraction of a millimetre of each other in width, which is the measurement your grip notices most, so they should feel close to the same in the hand.
Height is almost identical, so they sit the same in a pocket.
At 16 g heavier (0.6 oz), the iPhone 18 Pro Max is noticeably heftier when you hold it up to read.
Common questions
Is the iPhone 18 Pro Max bigger than the iPhone 17 Pro Max?
The iPhone 18 Pro Max and iPhone 17 Pro Max take up almost exactly the same space in your hand. Height differs by 0 mm and width by 0 mm.
Will a iPhone 17 Pro Max case fit the iPhone 18 Pro Max?
Their bodies are within 0.3 mm of each other, so some cases may fit both, but button and camera cutouts are designed per model. Only buy a case that lists the iPhone 18 Pro Max by name.
Which is easier to use with one hand?
They are the same width, so neither has an edge for one-handed reach. The shorter phone makes the top corners a little easier to reach.
Cases and prices
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Sources
- iPhone 18 Pro Max: manufacturer spec page
- iPhone 17 Pro Max: manufacturer spec page
See each phone's page for the full spec: iPhone 18 Pro Max and iPhone 17 Pro Max.