Quote Originally Posted by jasonm96 View Post
Don't let the size of the frog mistake you, tree frogs jump long distances, many times the length of their bodies and in a tank that size they can't and if they did, they'd smash of the side and hurt them self. Just far too small and it's not right, everyone will tell you so.
They aren't very heavy animals, so they don't have much momentum to hurt themselves with, and they'll jump into the glass anyway no matter how big the enclosure is. Even wild grays catching bugs around windows jump into glass. If they got injured from jumping into things, it would be trees during the truly long jumps they take in the wild.

I wouldn't house a tree frog in an enclosure that small, but is the frog injured or dead from smashing into the glass? No.