Below you can see the front view size comparison of Fujifilm X30 and Canon M3. Canon M3 is clearly the smaller of the two cameras. Its body is 8mm narrower, 4mm shorter and 16mm thinner than Fujifilm X30.
Fujifilm X30 vs Canon M3 - Front View
Fujifilm X30 vs Canon M3 - 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