Below you can see the front view size comparison of Sony A6000 and Olympus E-M10. Sony A6000 is 15mm shorter and 1mm thinner than Olympus E-M10 but it is also 1mm wider.
Sony A6000 vs Olympus E-M10 - Front View
Sony A6000 vs Olympus E-M10 - 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