Below you can see the front view size comparison of Fujifilm X-T1 and Fujifilm X-Pro1. Fujifilm X-Pro1 is 8mm shorter and 4mm thinner than Fujifilm X-T1 but it is also 11mm wider.
Fujifilm X-T1 vs Fujifilm X-Pro1 - Front View
Fujifilm X-T1 vs Fujifilm X-Pro1 - Top View
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.
Camera Size Comparison
Select Two Cameras for Size Comparison