iPhone 18 Pro Max vs iPhone SE (3rd gen) size
The iPhone 18 Pro Max measures 163.4 x 78 x 8.75 mm and the iPhone SE (3rd gen) measures 138.4 x 67.3 x 7.3 mm. The iPhone 18 Pro Max is the bigger phone. Its front covers 36.8% more area than the iPhone SE (3rd gen).
- iPhone 18 Pro Max249 g163.4 x 78 x 8.8 mm
- iPhone SE (3rd gen)144 g138.4 x 67.3 x 7.3 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 SE (3rd gen) | Difference |
|---|---|---|---|
| Height | 163.4 mm 6.43 in | 138.4 mm 5.45 in | +25 mm (+18.1%) |
| Width | 78 mm 3.07 in | 67.3 mm 2.65 in | +10.7 mm (+15.9%) |
| Thickness | 8.75 mm 0.34 in | 7.3 mm 0.29 in | +1.45 mm (+19.9%) |
| Weight | 249 g 8.8 oz | 144 g 5.1 oz | +105 g (+72.9%) |
| Screen | 6.9 in | 4.7 in | +2.2 in (+46.8%) |
| Front footprint | 127.5 cm² | 93.1 cm² | +34.3 cm² (+36.8%) |
What the difference feels like
The iPhone 18 Pro Max is 10.7 mm wider, an obvious difference in the hand. If you use your phone one-handed, the iPhone SE (3rd gen) will be easier to reach across.
In a jeans pocket the iPhone 18 Pro Max sits 25 mm higher, about 0.98 inches.
The iPhone 18 Pro Max is 1.45 mm thicker. Manufacturers measure thickness without the camera bump, so the real difference at the camera can be larger.
At 105 g heavier (3.7 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 SE (3rd gen)?
The iPhone 18 Pro Max is the bigger phone. Its front covers 36.8% more area than the iPhone SE (3rd gen). Height differs by 25 mm and width by 10.7 mm.
Will a iPhone SE (3rd gen) 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 25 mm in height and 10.7 mm in width. Buy a case made for the iPhone 18 Pro Max.
Which is easier to use with one hand?
The iPhone SE (3rd gen), because it is 10.7 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 SE (3rd gen): manufacturer spec page
See each phone's page for the full spec: iPhone 18 Pro Max and iPhone SE (3rd gen).