I have tree frogs, about an inch in size, a couple of them are a tad bigger but not much. The toads are 2-3 inches in size, and the bull frogs are 4-5 inches in size. I really do not know the age of them because I just recently got them all. All of my toads seem to have an enormous appatite, but the bullfrogs, and tree frogs don't seem to want to eat very much at all.