Below you can see the front-view size comparison of the Olympus TG-4 and Fujifilm X-E2S. The Olympus TG-4 is clearly the smaller of the two cameras. Its body is 17mm narrower, 9 mm shorter and 6 mm thinner than the Fujifilm X-E2S.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.