Below you can see the front view size comparison of Canon T7i and Panasonic GX85. Panasonic GX85 is clearly the smaller of the two cameras. Its body is 9mm narrower, 29mm shorter and 32mm thinner than Canon T7i.
Canon T7i vs Panasonic GX85 - Front View
Canon T7i vs Panasonic GX85 - 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