Below you can see the front view size comparison of Fujifilm X30 and Pentax WG-3. Pentax WG-3 is 8mm shorter and 27mm thinner than Fujifilm X30 but it is also 5mm wider.
Fujifilm X30 vs Pentax WG-3 - Front View
Fujifilm X30 vs Pentax WG-3 - 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