Below you can see the front view size comparison of Nikon P7100 and Nikon P7700. Nikon P7100 is 3mm narrower and 2mm thinner than Nikon P7700 but it is also 4mm taller.
Nikon P7100 vs Nikon P7700 - Front View
Nikon P7100 vs Nikon P7700 - 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