Apple has updated its
Accessory Design Guidelines, now featuring the exact physical dimensions of the new iPhone models, including camera plateau and all.
As I previously conjectured from the official renders, the Air’s camera more than doubles the overall thickness, adding an extra 5.68mm, with the plateau alone being 3.03mm. Since the plateau contains the SoC among other things, one could argue that the Air is really 5.64mm + 3.03mm = 8.67mm thick (and 11.32mm including the camera). For comparison, the iPhone 17 is 7.95mm + 3.45mm = 11.4mm.
[This was moved here from a different thread by moderation.]