Is that from snout to tip of the tail, or snout to vent. Honestly if it is snout to tip of tail, that sounds like a pretty average size. If it is snout to vent, you have a very big boy on your hands. 10 weeks is younger than most breeders will even start selling them at. Either way, the size sounds good to me.
It's from snout to tail tip I've had him home for 3 weeks ( 7 weeks old) he was 3.5 in from snout to tail tip then. He's already showing a lot of really bright greens/ whites and lots of red spots on his belly, also just starting with yellow this is my first panther chameleon, can you tell I'm super excited?