According to MacRumors, all iPhone 13 models will be thicker compared to the current 12-series, and the line will also receive changes in cameras.
New smartphones will be 0.15 mm thicker - it will be difficult to notice without special measurements. However, this will be enough for many cases and other accessories to become incompatible with new models.
According to the publication, Apple is preparing more significant changes to the rear panel with camera bumps on the iPhone 13 Pro and Pro Max. Both Pro models will now have 36mm by 37mm camera cutouts on the back, which is noticeably larger than the cutouts on the 12 Pro models. The Vanilla 13 will have a 29x29mm camera cutout compared to the 28x30mm for the iPhone 12.
The camera bump thickness is said to increase by about 3.65mm in the upcoming 13 Pro series, up from 1.5-1.7mm in the 12 Pro series. According to rumors, Apple will offer sensor-shift stabilization on both the main and ultra-wide cameras of the new models.