Below you can see the front view size comparison of Nikon D750 and Hasselblad X1D. Hasselblad X1D is 15mm shorter and 7mm thinner than Nikon D750 but it is also 9mm wider.
Nikon D750 vs Hasselblad X1D - Front View
Nikon D750 vs Hasselblad X1D - Top View
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.
Camera Size Comparison
Select Two Cameras for Size Comparison