Below you can see the front view size comparison of Canon RP and Pentax K-1 II. Canon RP is clearly the smaller of the two cameras. Its body is 4mm narrower, 25mm shorter and 16mm thinner than Pentax K-1 II.
Canon RP vs Pentax K-1 II - Front View
Canon RP vs Pentax K-1 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