Below you can see the front-view size comparison of the Ricoh GXR S10 24-72mm and Panasonic G7. The Ricoh GXR S10 24-72mm is clearly the smaller of the two cameras. Its body is 11mm narrower, 16 mm shorter and 33 mm thinner than the Panasonic G7.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.