iPhone 18 Pro Max vs iPhone 17 Pro Max: Are Cases and Screen Protectors Compatible?

Apple announced the iPhone 18 Pro Max on Wednesday, September 9, 2026, and the it will officially go on sale on September 18. For accessory sellers, the key concern is whether iPhone 17 Pro Max cases and screen protectors will also fit the new model.

Both models measure 163.4 × 78.0 × 8.75 mm and feature a 6.9-inch display with a 2868 × 1320 resolution, so some accessories may work across both models. But changes to the camera layout, buttons, screen edges, and cutouts can affect the fit.

Let's compare the iPhone 18 Pro Max and iPhone 17 Pro Max to see which cases and screen protectors can be used across both models.

iPhone 18 Pro Max vs iPhone 17 Pro Max: Quick Comparison

Specification	iPhone 18 Pro Max	iPhone 17 Pro Max
Starting Price	$1299	$1199
Announcement Date	September 9, 2026	September 9, 2025
Available From	September 18, 2026	September 19, 2026
Display	6.9-inch Super Retina XDR OLED	6.9-inch Super Retina XDR OLED
Resolution	2868 × 1320	2868 × 1320
Dimensions	163.4 × 78.0 × 8.75 mm	163.4 × 78.0 × 8.75 mm
Weight	249 g	233 g
Chip	A20 Pro	A19 Pro
Main Camera	48MP Fusion Main with variable aperture	48MP Fusion Main
Ultra Wide Camera	48MP Fusion Ultra Wide	48MP Fusion Ultra Wide
Telephoto Camera	48MP Fusion Telephoto	48MP Fusion Telephoto
Video Playback	Up to 45 hours	Up to 39 hours
Colors	Black, Silver, Glacier, Burgundy	Silver, Cosmic Orange, Deep Blue

The iPhone 18 Pro Max display remains the same 6.9-inch size and 2868 × 1320 resolution as the iPhone 17 Pro Max, while the new model brings upgrades to battery life, cameras, and performance. It also starts at a higher price of $1,299, compared with $1,199 for the previous generation.

Does an iPhone 17 Pro Max Case Fit the iPhone 18 Pro Max?

The iPhone 18 Pro Max and iPhone 17 Pro Max have the same dimensions:

• iPhone 18 Pro Max: 163.4 × 78.0 × 8.75 mm
• iPhone 17 Pro Max: 163.4 × 78.0 × 8.75 mm

The same dimensions make cross-generation case compatibility possible, and some cases are already compatible with both models.

Still, size is only part of the picture. Camera cutouts, Camera Control, buttons, and MagSafe placement can affect how a case fits and works.

To check whether an iPhone 17 Pro Max case will fit the iPhone 18 Pro Max, look at three key areas:

• Does the camera cutout line up correctly?
• Can you use Camera Control and the side buttons without any issues?
• Does the case fit securely around the phone?

If these areas are compatible, an iPhone 17 Pro Max case may also work with the iPhone 18 Pro Max. For cases with more precise cutouts or specific structural designs, check the listed compatible models before using them across both generations.

For retailers, this means some existing iPhone 17 Pro Max cases can continue to be sold for both models rather than being replaced when the new iPhone launches. For more model-to-model comparisons, see our iPhone case compatibility chart.

Does an iPhone 17 Pro Max Screen Protector Fit the iPhone 18 Pro Max?

Screen protector compatibility matters when planning inventory for a new iPhone launch.

Screen Size and Design

The iPhone 18 Pro Max and iPhone 17 Pro Max both feature a 6.9-inch Super Retina XDR OLED display with a 2868 × 1320 resolution and 460 ppi. Their screen size and shape are very similar, so so some iPhone 17 Pro Max screen protectors can also fit the iPhone 18 Pro Max.

Front Camera and Dynamic Island

Both models feature an 18MP Center Stage front camera. The iPhone 18 Pro Max, however, comes with a smaller, redesigned Dynamic Island. The change matters for full-coverage protectors and designs with precise cutouts around the top of the display, where even a small difference can affect the fit.

Protectors designed and tested for both models can be sold for either one. For products with more precise cutouts or specific coverage designs, retailers should follow the listed compatible models. For a broader overview of model compatibility, see our iPhone screen protector compatibility chart.

How Should Retailers Prepare

With a starting price of $1,299, the iPhone 18 Pro Max is a significant purchase, making protection an important part of the new-device experience. Cases, screen protectors, and camera lens protectors should remain among the core accessories for launch.

The iPhone 17 Pro Max will also continue to have a market. As the previous-generation model becomes more affordable, some buyers may still choose it, which means demand for iPhone 17 Pro Max accessories is likely to continue.

For retailers, it makes sense to keep serving both generations rather than replacing one with the other. Stock iPhone 18 Pro Max accessories alongside existing 17 Pro Max products, and consider listing cases and screen protectors for both models where compatibility has been confirmed. This can broaden product coverage while keeping SKU duplication under control.

The four new colours, Black, Silver, Glacier, and Burgundy, also create more opportunities for retailers to expand their case selection. Clear cases, matching colours, and designs that show off the phone's finish are all worth considering for launch.

Conclusion

The launch of the iPhone 18 Pro Max does not mean the end of the iPhone 17 Pro Max accessory market. Both generations can have a place in a well-balanced product range, depending on customer demand, confirmed compatibility, and existing stock levels.

TVCMALL offers 1.2M+ SKUs and 1,000+ new products every week, giving retailers a broad choice as their range evolves. From iPhone 18 Pro Max cases, screen protectors, camera lens protectors to chagring accessories, everything can be sourced in one place. Flexible purchasing, private labelling, and custom packaging are also available for retailers looking to develop products tailored to the European market.

Frequently Asked Questions

How much is the iPhone 18 Pro Max?

The iPhone 18 Pro Max price starts at $1,299 in the US. The 256GB model costs $1,299, while the 512GB, 1TB, and 2TB versions are priced at $1,499, $1,899, and $2,499, respectively.

What's the difference between the iPhone 18 Pro Max and iPhone 18 Pro?

The iPhone 18 Pro and iPhone 18 Pro Max share many of the same features, including the A20 Pro chip and Pro camera system. The main differences are size, weight, battery life, and price, with the Pro Max offering a larger 6.9-inch display and longer battery life

iPhone 18 Pro Max vs iPhone 17 Pro Max, should I wait or buy?

If you already have an iPhone 17 Pro Max, there may be no need to upgrade immediately. The iPhone 18 Pro Max brings improvements in battery life, camera features, and performance, but the iPhone 17 Pro Max is still a capable flagship. For those buying a new phone, the iPhone 18 Pro Max is the better choice for longer-term use.