For the iPhone 15, a 1mm lengthening in size distorts the iPhone 14's case, making it unable to be used. The mock-up iPhone 15 Plus did fit the case for the iPhone 14 Plus with seemingly no issues.

Japanese website Mac Otakara has shared a video in which supposedly size-accurate 3D-printed iPhone 15 dummies are compared to iPhone 14 cases, and... 3D-Printed iPhone 15 Models Used to Test ...

DuanRui shared images of a different iPhone case, this time claiming it was the proper "iPhone 13 Pro Max" case. These images show a much smaller increase in the "iPhone 13 Pro Max" camera bump size.