Below you can see the front-view size comparison of the Fujifilm X-T2 and Fujifilm X-H1. The Fujifilm X-T2 is clearly the smaller of the two cameras. Its body is 7mm narrower, 5 mm shorter and 37 mm thinner than the Fujifilm X-H1.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.