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iPhone 18 Pro & Pro Max Size and Dimensions, Compared
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iPhone 18 Pro & Pro Max Size and Dimensions, Compared
Apple's official iPhone 18 Pro dimensions: 150.0 x 71.9 x 8.75mm, and Pro Max 163.4 x 78.0 x 8.75mm. Identical to the iPhone 17 Pro, so most cases still fit.
Available nowApple has published the numbers. The iPhone 18 Pro is 6.3 inches, with a 150.0 x 71.9 x 8.75mm body confirmed on Apple’s own spec sheet, and the iPhone 18 Pro Max is 6.9 inches, with a 163.4 x 78.0 x 8.75mm body confirmed on Apple’s own spec sheet. Both bodies are identical in size to last year’s iPhone 17 Pro pair, which is the detail that decides case fit. The camera changed instead: A 48MP Fusion main camera with a variable aperture that moves between f/1.48 and f/4 on six laser-cut blades, on both the Pro and the Pro Max rather than the Pro Max alone. Last updated 29 September 2026.
How big are the iPhone 18 Pro and Pro Max?
Apple’s spec sheet puts the iPhone 18 Pro at 6.3 inches, with a 150.0 x 71.9 x 8.75mm body confirmed on Apple’s own spec sheet and the iPhone 18 Pro Max at 6.9 inches, with a 163.4 x 78.0 x 8.75mm body confirmed on Apple’s own spec sheet. Both bodies are millimetre for millimetre the same as the iPhone 17 Pro pair, so if a 17 Pro feels right in your hand today, the 18 will feel identical.
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These are Apple’s own published figures, not estimates. The iPhone 18 Pro body is 150.0 x 71.9 x 8.75mm and the Pro Max is 163.4 x 78.0 x 8.75mm, exactly matching the iPhone 17 Pro and 17 Pro Max.
| Spec | iPhone 18 Pro | iPhone 18 Pro Max | iPhone 17 Pro | iPhone 17 Pro Max |
|---|---|---|---|---|
| Screen size | 6.3 in | 6.9 in | 6.3 in | 6.9 in |
| Height | 150.0 mm, same as 17 Pro | 163.4 mm, same as 17 Pro Max | Similar class (~150 mm) | Similar class (~163 mm) |
| Width | 150.0 mm, same as 17 Pro | 163.4 mm, same as 17 Pro Max | Similar class (~72 mm) | Similar class (~78 mm) |
| Thickness | 8.75 mm, same as last year | 8.75 mm, same as last year | Roughly 8 to 8.75 mm class | Roughly 8 to 8.75 mm class |
| Camera area | Redesigned plateau, variable aperture | Redesigned plateau, variable aperture | Existing 17 Pro plateau | Existing 17 Pro Max plateau |
| Case fit note | Most 17 Pro cases fit, check camera coverage | Most 17 Pro cases fit, check camera coverage | 17 Pro cases fit 17 Pro | 17 Pro Max cases fit 17 Pro Max |
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iPhone 18 Pro vs 17 Pro dimensions, side by side
Here is how the iPhone 18 Pro and Pro Max stack up against the iPhone 17 Pro and Pro Max, using Apple’s published figures for both generations.
The headline difference is not overall size, it is the a 48MP Fusion main camera with a variable aperture that moves between f/1.48 and f/4 on six laser-cut blades, on both the Pro and the Pro Max rather than the Pro Max alone. That reshaped camera area is the part most likely to affect whether an old case still fits.
What the size change means for your case fit
Height, width and thickness look set to stay close to the iPhone 17 Pro generation, so the body outline should feel similar. The catch is the camera area. Because of the a 48MP Fusion main camera with a variable aperture that moves between f/1.48 and f/4 on six laser-cut blades, on both the Pro and the Pro Max rather than the Pro Max alone, case fit for the iPhone 18 Pro is more nuanced than the shared body suggests: Apple’s specs page confirms the same 150.0 x 71.9 x 8.75mm (Pro) and 163.4 x 78.0 x 8.75mm (Pro Max) dimensions as the iPhone 17 Pro, but case makers report the rear camera bump sits about 0.5mm taller, so guidance is split. OtterBox and Mous say their iPhone 17 Pro cases still work on the iPhone 18 Pro, while Rokform and Native Union call older cases incompatible or risky around the lens, so a case built specifically for the iPhone 18 Pro is the safer bet.
In plain terms: even if the phone slots into an old case, the camera cutout may not line up, leaving lenses exposed or blocked. If you want proper protection from day one, plan on a case built for the iPhone 18 Pro shape. We break the details down in our iPhone 17 to 18 case fit guide.
Which size should you buy, Pro or Pro Max?
If you like one-handed use and a lighter phone in the pocket, the smaller iPhone 18 Pro at around 6.3 inches, with a 150.0 x 71.9 x 8.75mm body confirmed on Apple’s own spec sheet is the friendlier pick. If you want the largest screen for videos, gaming and reading, the iPhone 18 Pro Max at around 6.9 inches, with a 163.4 x 78.0 x 8.75mm body confirmed on Apple’s own spec sheet gives you more room, with a bit more weight to match.
Whichever you choose, we have a case ready. Browse the iPhone 18 Pro cases or the iPhone 18 Pro Max cases, including our ProGuard impact-protection range.
If you have already settled on the larger one, our iPhone 18 Pro Max guide goes deeper on that model specifically.
- iPhone 18 Pro (around 6.3 inches, with a 150.0 x 71.9 x 8.75mm body confirmed on Apple’s own spec sheet): easier one-handed use, lighter, pocket-friendly
- iPhone 18 Pro Max (around 6.9 inches, with a 163.4 x 78.0 x 8.75mm body confirmed on Apple’s own spec sheet): biggest screen, best for media and gaming
- Both share the same a 48MP Fusion main camera with a variable aperture that moves between f/1.48 and f/4 on six laser-cut blades, on both the Pro and the Pro Max rather than the Pro Max alone, so check camera coverage on any case you reuse
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Not sure which style suits you? The ProGuard cases give you serious drop protection, while our clear and slim options keep things light. Compare them in our ProGuard vs clear vs slim guide.
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Questions, answered
How big is the iPhone 18 Pro screen?
The iPhone 18 Pro screen is 6.3 inches, with a 150.0 x 71.9 x 8.75mm body confirmed on Apple’s own spec sheet, the same as the iPhone 17 Pro. The body is 150.0 x 71.9 x 8.75mm, also identical to last year. Last updated 29 September 2026.
How big is the iPhone 18 Pro Max?
The iPhone 18 Pro Max is 6.9 inches, with a 163.4 x 78.0 x 8.75mm body confirmed on Apple’s own spec sheet, matching the iPhone 17 Pro Max and making it the largest screen in the regular lineup. Its body is 163.4 x 78.0 x 8.75mm.
Is the iPhone 18 bigger than the iPhone 17?
No. Both bodies are exactly the same size as the iPhone 17 Pro pair, at 6.3 inches, with a 150.0 x 71.9 x 8.75mm body confirmed on Apple’s own spec sheet and 6.9 inches, with a 163.4 x 78.0 x 8.75mm body confirmed on Apple’s own spec sheet. The change is the camera: A 48MP Fusion main camera with a variable aperture that moves between f/1.48 and f/4 on six laser-cut blades, on both the Pro and the Pro Max rather than the Pro Max alone.
Will my iPhone 17 Pro case fit the iPhone 18 Pro?
Often yes this year. Case fit for the iPhone 18 Pro is more nuanced than the shared body suggests: Apple’s specs page confirms the same 150.0 x 71.9 x 8.75mm (Pro) and 163.4 x 78.0 x 8.75mm (Pro Max) dimensions as the iPhone 17 Pro, but case makers report the rear camera bump sits about 0.5mm taller, so guidance is split. OtterBox and Mous say their iPhone 17 Pro cases still work on the iPhone 18 Pro, while Rokform and Native Union call older cases incompatible or risky around the lens, so a case built specifically for the iPhone 18 Pro is the safer bet The thing to check is the camera cutout rather than the body. See our fit guide.
How thick is the iPhone 18 Pro?
Both are 8.75mm, exactly the same as the iPhone 17 Pro and 17 Pro Max, so there is no change in pocket feel. Confirmed on Apple’s spec sheet.
When can I buy the iPhone 18 Pro in Malaysia?
The iPhone 18 Pro and Pro Max are on sale from Friday 18 September 2026, with pre-orders from Saturday 12 September. In detail, pre-orders open on Saturday 12 September at 5am Pacific, which is 8pm Malaysian time, and the phones reach stores on Friday 18 September. For Malaysia, Malaysia is named in Apple’s first wave of more than 65 countries, so pre-orders open here on 12 September and stock lands in stores on Friday 18 September. The standard iPhone 18 and 18e are the only models still unannounced: The standard iPhone 18 and iPhone 18e are reported to arrive later, around the first half of 2027.
Specifications and pricing here follow Apple’s official announcement. Case fit is confirmed against the shipping device. Last updated 29 September 2026.
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