The iPhone SE (3rd generation) is even smaller with a 4.7-inch screen — however, this is largely due to the physical Touch ID button that takes up part of the phone's lower half. Because of the ...
At 6.3 inches, it would be in between the size of the 6.1-inch iPhone 15 and the 6.7-inch iPhone 15 Plus. However, next year there may be only one non-Pro model in Apple's lineup (see below).