Below you can see the front view size comparison of Canon 60D and Canon 750D. Canon 750D is clearly the smaller of the two cameras. Its body is 13mm narrower, 5mm shorter and 1mm thinner than Canon 60D.
Canon 60D vs Canon 750D - Front View
Canon 60D vs Canon 750D - 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