iPhone 18 Pro Max vs iPhone 13 size
The iPhone 18 Pro Max measures 163.4 x 78 x 8.75 mm and the iPhone 13 measures 146.7 x 71.5 x 7.65 mm. The iPhone 18 Pro Max is the bigger phone. Its front covers 21.5% more area than the iPhone 13.
- iPhone 18 Pro Max249 g163.4 x 78 x 8.8 mm
- iPhone 13174 g146.7 x 71.5 x 7.7 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 13 | Difference |
|---|---|---|---|
| Height | 163.4 mm 6.43 in | 146.7 mm 5.78 in | +16.7 mm (+11.4%) |
| Width | 78 mm 3.07 in | 71.5 mm 2.81 in | +6.5 mm (+9.1%) |
| Thickness | 8.75 mm 0.34 in | 7.65 mm 0.30 in | +1.1 mm (+14.4%) |
| Weight | 249 g 8.8 oz | 174 g 6.1 oz | +75 g (+43.1%) |
| Screen | 6.9 in | 6.1 in | +0.8 in (+13.1%) |
| Front footprint | 127.5 cm² | 104.9 cm² | +22.6 cm² (+21.5%) |
What the difference feels like
The iPhone 18 Pro Max is 6.5 mm wider, an obvious difference in the hand. If you use your phone one-handed, the iPhone 13 will be easier to reach across.
In a jeans pocket the iPhone 18 Pro Max sits 16.7 mm higher, about 0.66 inches.
The iPhone 18 Pro Max is 1.1 mm thicker. Manufacturers measure thickness without the camera bump, so the real difference at the camera can be larger.
At 75 g heavier (2.6 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 13?
The iPhone 18 Pro Max is the bigger phone. Its front covers 21.5% more area than the iPhone 13. Height differs by 16.7 mm and width by 6.5 mm.
Will a iPhone 13 case fit the iPhone 18 Pro Max?
No. A case is cut for one model's exact size, buttons and camera, and these two differ by 16.7 mm in height and 6.5 mm in width. Buy a case made for the iPhone 18 Pro Max.
Which is easier to use with one hand?
The iPhone 13, because it is 6.5 mm narrower. Width matters more than height for reaching across the screen with your thumb.
Cases and prices
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Sources
- iPhone 18 Pro Max: manufacturer spec page
- iPhone 13: manufacturer spec page
See each phone's page for the full spec: iPhone 18 Pro Max and iPhone 13.