Mine is just about at the 3ft mark. I doubt he will get much longer if at all. He should put on some girth though. I am hoping to get a female this year and once she is full grown I may house them together. Right now mine is in a 3ftx18inx16in cage and he uses every bit of it. He climbs and cruises all day long. That being said I would go no smaller than what I have him in now, if I every do house together then I will be deciding between a 3x2x2 or 4x2x2.