Below you can see the front-view size comparison of the Fujifilm GFX 100 and Hasselblad X1D. The Hasselblad X1D is clearly the smaller of the two cameras. Its body is 6 mm narrower, 66 mm shorter and 32 mm thinner than the Fujifilm GFX 100.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.