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iPhone 18 Pro Max Size and Dimensions: Official Measurements
iPhone 18 Pro Max Size and Dimensions: Official Measurements
Apple has published the iPhone 18 Pro Max dimensions, so planning a case, a dock or a gold edition no longer involves any guesswork. The phone stands 163.4 mm tall, 78.0 mm wide and 8.75 mm deep, and it weighs 249 g. Updated on 17 September 2026 from Apple’s technical specifications, this guide sets those numbers beside the iPhone 18 Pro and the two previous Pro Max generations, and explains what they mean for cases and gold editions.
Key Takeaways
- iPhone 18 Pro Max: 163.4 × 78.0 × 8.75 mm, 249 g, 6.9-inch display. iPhone 18 Pro: 150.0 × 71.9 × 8.75 mm, 211 g, 6.3-inch display.
- The 18 Pro Max keeps the exact height, width and depth of the iPhone 17 Pro Max; only the weight moves, up by 16 g.
- Next to the iPhone 16 Pro Max, the new model is 0.4 mm taller, 0.4 mm wider, 0.5 mm deeper and 22 g heavier.
- Pro Max weight has climbed with each generation: 227 g, then 233 g, and now 249 g.
- Identical outer measurements are not a promise of case fit. Camera and button openings should be confirmed with whoever makes the case.
Table of Contents
Quick Answer
Apple lists the iPhone 18 Pro Max at 163.4 mm high, 78.0 mm wide and 8.75 mm deep, with a weight of 249 g. On paper its shell is the same size as the iPhone 17 Pro Max, yet it carries an extra 16 g. The smaller iPhone 18 Pro measures 150.0 by 71.9 by 8.75 mm and weighs 211 g.
Official iPhone 18 Pro Max Dimensions
| Measurement | iPhone 18 Pro Max | iPhone 18 Pro |
|---|---|---|
| Height | 163.4 mm | 150.0 mm |
| Width | 78.0 mm | 71.9 mm |
| Depth | 8.75 mm | 8.75 mm |
| Weight | 249 g | 211 g |
| Display | 6.9″, ProMotion up to 120Hz | 6.3″, ProMotion up to 120Hz |
Figures come from Apple’s iPhone 18 Pro technical specifications. Height, width and depth describe the slab of the phone, not the camera area, which is the part of a case that most often needs checking.
iPhone 18 Pro vs iPhone 18 Pro Max: How Much Larger?
With a shared 8.75 mm depth, the difference lies entirely in the footprint. The Pro Max adds 13.4 mm of height and 6.1 mm of width, trades the 6.3-inch screen for a 6.9-inch one, and weighs 38 g more. What that extra size buys is endurance: Apple rates the Pro Max at up to 45 hours of video playback on eSIM-only models, against up to 36 hours for the Pro.
Choosing between them for a gold edition? Our iPhone 18 Pro vs Pro Max guide covers comfort and design space.
iPhone 18 Pro Max Dimensions Against the 17 Pro Max and 16 Pro Max
| Pro Max generation | iPhone 18 Pro Max | iPhone 17 Pro Max | iPhone 16 Pro Max |
|---|---|---|---|
| Height | 163.4 mm | 163.4 mm | 163 mm |
| Width | 78.0 mm | 78.0 mm | 77.6 mm |
| Depth | 8.75 mm | 8.75 mm | 8.25 mm |
| Weight | 249 g | 233 g | 227 g |
The shell last changed a year ago. Moving from the iPhone 16 Pro Max to the 17 Pro Max, Apple added 0.4 mm to the height, 0.4 mm to the width and half a millimetre to the depth. For the 18 Pro Max it left all three untouched, so a ruler finds no difference between the two phones and only a set of scales does.
The 6.3-Inch Pro Over Three Generations
| Pro generation | iPhone 18 Pro | iPhone 17 Pro | iPhone 16 Pro |
|---|---|---|---|
| Height | 150.0 mm | 150.0 mm | 149.6 mm |
| Width | 71.9 mm | 71.9 mm | 71.5 mm |
| Depth | 8.75 mm | 8.75 mm | 8.25 mm |
| Weight | 211 g | 206 g | 199 g |
The smaller model follows suit: the 17 Pro and 18 Pro share an outline and sit 5 g apart, while the 16 Pro is fractionally smaller in every direction.
Weight by Generation
| Generation | Pro Max weight | Pro weight |
|---|---|---|
| iPhone 16 | 227 g | 199 g |
| iPhone 17 | 233 g (+6 g) | 206 g (+7 g) |
| iPhone 18 | 249 g (+16 g) | 211 g (+5 g) |
Across two generations the Pro Max has gained 22 g, and most of that arrived this year without any change to its outline. The same generation brings the A20 Pro chip with a next-generation vapour chamber, and Apple’s rated video playback on the Pro Max rises from 39 hours on the 17 Pro Max to 45 hours. If lightness matters more, the 165 g iPhone Air is the counterpoint, compared in our iPhone 18 Pro Max vs iPhone Air guide.
What Unchanged Dimensions Mean for Cases
A case built for the iPhone 17 Pro Max has the right outer envelope for the 18 Pro Max on paper, but that alone does not prove it fits. Apple does not issue case compatibility statements, and a case also depends on the camera cut-out, the button openings and the USB‑C opening lining up. Ask the case maker to confirm before you move an older case to the new phone.
- Look for the iPhone 18 Pro Max by name on the manufacturer’s compatibility list.
- Check that the camera opening clears the lenses and every side button presses cleanly.
- If you use MagSafe chargers or wallets, make sure the case is built for them.
An iPhone 16 Pro Max case is a different matter, because it was shaped around a body that is smaller in every direction. Our guide to whether iPhone 18, 17 and 16 are the same size sets out the full cross-generation picture, including accessories.
Gold Editions and the 18K Centrepiece
GoldPrivé builds every edition from a new, unlocked iPhone 18 Pro or Pro Max, customised by hand in its Dubai atelier; the internals, display and cameras are never modified. In the 24K gold iPhone 18 Pro Max collection, priced from $ 2,990 to $ 15,790, construction varies by line. Ultimate, Éclat and Carbon Craft designs receive a new plated back panel and a plated aluminium frame, while Timeless editions keep Apple’s back and plate only the camera rings, side buttons and logo.
The 18K solid gold editions go further. Each of the six designs sets a centrepiece of 18K (750) gold, forged separately, into a custom back plate, and pairs it with a 24K gold-plated frame. GoldPrivé states that the Élysian centrepiece alone is around 80 to 100 grams, which is worth weighing up on a phone that already starts at 249 g. These editions run from $ 16,220 to $ 26,970 and do not support wireless charging. Our 24K plating vs 18K solid gold guide compares the two approaches.
GoldPrivé Cases Sized for Pro and Pro Max
If you would rather leave the phone exactly as Apple made it, GoldPrivé offers 21 gold cases for iPhone 18 Pro and Pro Max across its Ultimate, Éclat, Exotic Skin, Pearl Edition and Carbon Craft lines. Every design is produced in a 6.3-inch Pro size and a 6.9-inch Pro Max size, plated in 24K Gold, Rose Gold or Platinum at 5 to 7 microns, and built on a precision magnetic frame system with a snap-in fit. The Pro Max size costs $100 more, starting at $1,490 for Prestige. Fit, MagSafe and every finish are explained in our gold iPhone 18 Pro Max case guide.
Gold for the 6.9-Inch Pro Max
Choose a customised phone from the 24K gold collection, or a gold case in Pro and Pro Max sizes.
Need the finished size or weight of a particular edition? Speak with a GoldPrivé consultant before you commit.
FAQs
What are the iPhone 18 Pro Max dimensions?
Apple lists it at 163.4 mm tall, 78.0 mm wide and 8.75 mm deep, weighing 249 g, with a 6.9-inch display.
Is the iPhone 18 Pro Max bigger than the iPhone 17 Pro Max?
No. Height, width and depth are identical. The iPhone 18 Pro Max is heavier, at 249 g against 233 g.
How much larger is the iPhone 18 Pro Max than the iPhone 18 Pro?
It is 13.4 mm taller and 6.1 mm wider at the same 8.75 mm depth, and 38 g heavier. Its display is 6.9 inches rather than 6.3.
How does it compare with the iPhone 16 Pro Max?
It is 0.4 mm taller, 0.4 mm wider, 0.5 mm deeper and 22 g heavier than the 227 g iPhone 16 Pro Max.
Will my iPhone 17 Pro Max case fit the iPhone 18 Pro Max?
The outer measurements match on paper, but Apple publishes no case compatibility statements, so ask the case maker to confirm the camera cut-out and button openings.
How heavy is the iPhone 18 Pro?
211 g, which is 5 g more than the iPhone 17 Pro, in an identical 150.0 × 71.9 × 8.75 mm shell.
Does an 18K solid gold edition add weight?
It adds a solid gold centrepiece, and GoldPrivé states the one on the Élysian design is around 80 to 100 grams. For the finished weight of a specific design, ask a GoldPrivé consultant.
Does GoldPrivé make gold cases in both Pro sizes?
Yes. Each of its 21 gold cases is offered in a 6.3-inch iPhone 18 Pro size and a 6.9-inch iPhone 18 Pro Max size, with the larger size priced $100 higher.
Sources
- Apple — iPhone 18 Pro and iPhone 18 Pro Max Technical Specifications
- Apple Newsroom — Apple debuts iPhone 18 Pro and iPhone 18 Pro Max
- Apple — iPhone 17 Pro Max Technical Specifications
- Apple — iPhone 17 Pro Technical Specifications
- Apple — iPhone 16 Pro Max Technical Specifications
- Apple — iPhone 16 Pro Technical Specifications
