Below you can see the front view size comparison of Pentax KP and Sony A7 II. Sony A7 II is clearly the smaller of the two cameras. Its body is 5mm narrower, 5mm shorter and 16mm thinner than Pentax KP.
Pentax KP vs Sony A7 II - Front View
Pentax KP vs Sony A7 II - 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