Are the iPhone 11 and iPhone XR the Same Size?
Yes, the iPhone 11 and the iPhone XR are the same size and they weigh the same as well. They both feature a 6.1 inch display.
A case from one will likely fit the other. Just verify that if you’re using a case from an iPhone XR, for an iPhone 11, that the case hole for the camera is long enough to fit the lenses on the back of the iPhone 11.