Below you can see the front-view size comparison of the Olympus E-PL7 and Ricoh GXR S10 24-72mm. The Olympus E-PL7 is 3 mm shorter and 6 mm thinner than the Ricoh GXR S10 24-72mm but it is also 1 mm wider.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.