These guys, at most, can take 2-2 1/2 months to morph. My guess is he became a froglet at the beginning of August, end of July, placing his birth no earlier than May. But these frogs grow fast, so I would say that he was born in June, morphed in August, and had a healthy growth spurt for him to be the size he was when you got him. I think my math makes sense...it was not my strongest subject in school though.