TIL that the iPhone Air camera bump is thicker than the main body

From the page 329 of the Accessory Design Guidelines[1], the camera bump is 5.68mm thick, the main body is 5.64mm, as advertised everywhere, which brings the total thickness to 11.32mm.

Is this good? Is this bad? Don't know, don't care.

[1] https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdf