iPhone 18 Pro vs iPhone 15 size
The iPhone 18 Pro measures 150 x 71.9 x 8.75 mm and the iPhone 15 measures 147.6 x 71.6 x 7.8 mm. The iPhone 18 Pro is the bigger phone. Its front covers 2.1% more area than the iPhone 15.
- iPhone 18 Pro211 g150 x 71.9 x 8.8 mm
- iPhone 15171 g147.6 x 71.6 x 7.8 mm
Outlines are drawn from published dimensions. Screen and camera shapes are simplified.
How the iPhone 18 Pro measures up
| Spec | iPhone 18 Pro | iPhone 15 | Difference |
|---|---|---|---|
| Height | 150 mm 5.91 in | 147.6 mm 5.81 in | +2.4 mm (+1.6%) |
| Width | 71.9 mm 2.83 in | 71.6 mm 2.82 in | +0.3 mm (+0.4%) |
| Thickness | 8.75 mm 0.34 in | 7.8 mm 0.31 in | +0.95 mm (+12.2%) |
| Weight | 211 g 7.4 oz | 171 g 6.0 oz | +40 g (+23.4%) |
| Screen | 6.3 in | 6.1 in | +0.2 in (+3.3%) |
| Front footprint | 107.9 cm² | 105.7 cm² | +2.2 cm² (+2.1%) |
What the difference feels like
The two are within 0.3 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.
In a jeans pocket the iPhone 18 Pro sits 2.4 mm higher, about 0.09 inches.
The iPhone 18 Pro is 0.95 mm thicker. Manufacturers measure thickness without the camera bump, so the real difference at the camera can be larger.
At 40 g heavier (1.4 oz), the iPhone 18 Pro is noticeably heftier when you hold it up to read.
Common questions
Is the iPhone 18 Pro bigger than the iPhone 15?
The iPhone 18 Pro is the bigger phone. Its front covers 2.1% more area than the iPhone 15. Height differs by 2.4 mm and width by 0.3 mm.
Will a iPhone 15 case fit the iPhone 18 Pro?
No. A case is cut for one model's exact size, buttons and camera, and these two differ by 2.4 mm in height and 0.3 mm in width. Buy a case made for the iPhone 18 Pro.
Which is easier to use with one hand?
The iPhone 15, because it is 0.3 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: manufacturer spec page
- iPhone 15: manufacturer spec page
See each phone's page for the full spec: iPhone 18 Pro and iPhone 15.