iPhone 17 Air could be Apple’s thinnest iPhone yet — and be the first step to the iPhone Flip
On top of that, Gurman states that the iPhone 17 Air will be around 2mm thinner than current iPhones, which would make the Air 5.8mm or 6.3mm thick (0.23 or 0.25 inches) depending on if you're using the standard or Pro models as a basis. For reference, the iPhone 17 Air has been reported to be around 5.5mm or 6.25mm thick in other reports.