Below you can see the front-view size comparison of the Fujifilm XQ2 and Olympus E-PL5. The Fujifilm XQ2 is clearly the smaller of the two cameras. Its body is 11mm narrower, 5 mm shorter and 5 mm thinner than the Olympus E-PL5.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.