Below you can see the front view size comparison of Fujifilm X-E2S and Sigma Quattro. Fujifilm X-E2S is clearly the smaller of the two cameras. Its body is 18mm narrower, 20mm shorter and 54mm thinner than Sigma Quattro.
Fujifilm X-E2S vs Sigma Quattro - Front View
Fujifilm X-E2S vs Sigma Quattro - Top View
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.
Camera Size Comparison
Select Two Cameras for Size Comparison