Below you can see the front-view size comparison of the Nikon 1 J5 and Hasselblad X1D. The Nikon 1 J5 is clearly the smaller of the two cameras. Its body is 52mm narrower, 38 mm shorter and 39 mm thinner than the Hasselblad X1D.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.