Below you can see the front-view size comparison of the Panasonic ZR3 and Fujifilm X-A2. The Panasonic ZR3 is clearly the smaller of the two cameras. Its body is 19mm narrower, 12 mm shorter and 14 mm thinner than the Fujifilm X-A2.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.