Hi,
Do you know that galaxy s7 edge will fit to osmo phone holder?

Yeah I have one it fits in, I dont have a case but I think a light case would fit too.

http://www.gsmarena.com/samsung_galaxy_s7_edge-7945.php
As showed in above webpage, the body's size of Samsung galaxy s7 edge is 150.9 x 72.6 x 7.7 mm.
The Osmo holder can hold a mobile device with the size of less than 170m.
So, it fits in the Osmo holder.