Below you can see the front-view size comparison of the Panasonic G85 and Olympus E-M10 III. The Olympus E-M10 III is clearly the smaller of the two cameras. Its body is 6 mm narrower, 5 mm shorter and 24 mm thinner than the Panasonic G85.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.