Below you can see the front view size comparison of Panasonic GX85 and Pentax K-S2. Panasonic GX85 is clearly the smaller of the two cameras. Its body is 1mm narrower, 20mm shorter and 29mm thinner than Pentax K-S2.
Panasonic GX85 vs Pentax K-S2 - Front View
Panasonic GX85 vs Pentax K-S2 - 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