Are the iPhone X and iPhone XS the Same Size?
The dimensions of the iPhone X and XS are the same. However, people have noted that the camera bump on the back of the XS is just a little taller (25.50 mm) than the iPhone X.
Apple never marketed the phone cases for each model as compatible with the other but often you can get away with using a case from one model, for the other. The dimensions of the iPhone XS are below: