iPhone 18 Pro Max vs Galaxy S26 Ultra size
The iPhone 18 Pro Max measures 163.4 x 78 x 8.75 mm and the Galaxy S26 Ultra measures 163.6 x 78.1 x 7.9 mm. The iPhone 18 Pro Max and Galaxy S26 Ultra take up almost exactly the same space in your hand.
- iPhone 18 Pro Max249 g163.4 x 78 x 8.8 mm
- Galaxy S26 Ultra214 g163.6 x 78.1 x 7.9 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 | Galaxy S26 Ultra | Difference |
|---|---|---|---|
| Height | 163.4 mm 6.43 in | 163.6 mm 6.44 in | -0.2 mm (-0.1%) |
| Width | 78 mm 3.07 in | 78.1 mm 3.07 in | -0.1 mm (-0.1%) |
| Thickness | 8.75 mm 0.34 in | 7.9 mm 0.31 in | +0.85 mm (+10.8%) |
| Weight | 249 g 8.8 oz | 214 g 7.5 oz | +35 g (+16.4%) |
| Screen | 6.9 in | 6.9 in | Same |
| Front footprint | 127.5 cm² | 127.8 cm² | -0.3 cm² (-0.3%) |
What the difference feels like
The two are within 0.1 mm 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.
The iPhone 18 Pro Max is 0.85 mm thicker. Manufacturers measure thickness without the camera bump, so the real difference at the camera can be larger.
At 35 g heavier (1.2 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 Galaxy S26 Ultra?
The iPhone 18 Pro Max and Galaxy S26 Ultra take up almost exactly the same space in your hand. Height differs by 0.2 mm and width by 0.1 mm.
Will a Galaxy S26 Ultra 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 0.2 mm in height and 0.1 mm in width. Buy a case made for the iPhone 18 Pro Max.
Which is easier to use with one hand?
The iPhone 18 Pro Max, because it is 0.1 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
- Galaxy S26 Ultra: manufacturer spec page
See each phone's page for the full spec: iPhone 18 Pro Max and Galaxy S26 Ultra.