Below you can see the front view size comparison of Nikon D5600 and Samsung NX30. Samsung NX30 is 1mm shorter and 12mm thinner than Nikon D5600 but it is also 3mm wider.
Nikon D5600 vs Samsung NX30 - Front View
Nikon D5600 vs Samsung NX30 - 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