*Bloomberg*'s Mark Gurman [noted on X (Twitter)](https://x.com/markgurman/status/2089904460105711895?s=20) today that Otterbox is already selling iPhone 18 Pro cases at Best Buy. While the timing is early for a new iPhone that isn't expected to launch until mid-September, what's more interesting is that Otterbox's packaging indicates the iPhone 18 Pro will fit iPhone 17 Pro cases and vice versa.

Gurman passed on the packaging detail without saying whether he agrees with the implied sizing, but rumors suggest the iPhone 18 Pro lineup will largely retain the same design as the iPhone 17 Pro models. However, at least two leakers have claimed that the iPhone 18 Pro Max could be [thicker](https://www.macrumors.com/2025/11/12/iphone-18-pro-max-heaviest-iphone-ever/) and [heavier](https://www.macrumors.com/2025/11/12/iphone-18-pro-max-heaviest-iphone-ever/) than its predecessor, owing to its [larger battery](https://www.macrumors.com/2026/07/06/iphone-18-pro-battery-capacities-revealed/).Related Roundups: [iPhone 17 Pro](https://www.macrumors.com/roundup/iphone-17-pro/), [iPhone 18 Pro](https://www.macrumors.com/roundup/iphone-18-pro/)Tag: [Mark Gurman](https://www.macrumors.com/guide/mark-gurman/)Buyer's Guide: [iPhone 17 Pro (Don't Buy)](https://buyersguide.macrumors.com/#iPhone-17-Pro)Related Forum: [iPhone](https://forums.macrumors.com/forums/iphone.99)

This article, "[iPhone 17 Pro Cases Fit iPhone 18 Pro - Or At Least Otterbox Thinks So](https://www.macrumors.com/2026/08/19/iphone-17-pro-cases-fit-iphone-18-pro/)" first appeared on [MacRumors.com](https://www.macrumors.com)

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