Below you can see the front view size comparison of Fujifilm X-E3 and Nikon 1 V3. Nikon 1 V3 is clearly the smaller of the two cameras. Its body is 10mm narrower, 9mm shorter and 10mm thinner than Fujifilm X-E3.
Fujifilm X-E3 vs Nikon 1 V3 - Front View
Fujifilm X-E3 vs Nikon 1 V3 - 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