Below you can see the front view size comparison of Sony A6300 and Canon M6. Canon M6 is 8mm narrower and 4mm thinner than Sony A6300 but it is also 1mm taller.
Sony A6300 vs Canon M6 - Front View
Sony A6300 vs Canon M6 - 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