Didn't know this about the display sizes...
I have the 5 on pre-order but thought that the 5X was bigger as well on the display size.
i was doing some quick research and found that just the 5X housing is bigger but the screen is the same size between the 5 and 5X.
If correct, makes me even happier as i really didn't want the bulk of the 5X and liked the size of the overall watch better on the 5.
Display sizes.
5X - 1.2" (240x240)
5 - 1.2" (240x240)
5S - 1.1" (218x218)
overall watch sizes:
5X - 51mm
5 - 47mm
5s - 42MM