5 Size and Construction
All three 2018 iPhone models flaunt similar designs, featuring edge-to-edge touchscreen displays (of varying sizes), sleek rounded corners and edges, Apple’s signature TrueDepth Camera notch and no hardware Home button unlike previous-generation models.
Despite their similarities, the iPhone XS and XS Max can be distinguished as the smallest and largest of the three handsets — boasting 5.8- and 6.5-inch touchscreen displays, respectively.
The iPhone XR falls in-between them, with its generous 6.1-inch touchscreen which is larger than the XS.
Beyond their outward facades, the iPhone XS/XS Max can be distinguished from the iPhone XR based on their build materials — with the iPhone XS/XS Max being constructed around a more premium surgical grade stainless-steel chassis, and the iPhone XR retaining the aerospace-grade 7000 series aluminum similar to the iPhone 8 and 7.