Below you can see the front-view size comparison of the Fujifilm XQ2 and Fujifilm X-E2S. The Fujifilm XQ2 is clearly the smaller of the two cameras. Its body is 29mm narrower, 16 mm shorter and 4 mm thinner than the Fujifilm X-E2S.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.