they're all different, just for a comparason, my almost 5 month old is 17 3/4" & 303 grams. When we got her she was 2 months old, about 9" & about 55 grams
A dragon should be 6 inches from nose to tail tip by the time they're 2 months old generally speaking. Here's a generalized questionnaire so we can look over your husbandry and point out anything that could be improved.
How old is your dragon?
How long is he?
How long have you had him?
Where did you get him from?
What size tank is he in?
What substrate are you using?
What do you use to heat the tank?
What are the temperatures (basking spot and cool side) in the tank?
What do you use to measure the temperatures?
What UVB light do you use?
Is it a coil/compact, a flourescent tube, or a mercury vapor bulb?
How old is it?
How close can your dragon get to it?
What do you feed your dragon?
How often?
What supplements do you use?
How often?
Do you mist or bath your dragon?
How often?
Wow. My baby is way undersized because of neglect before I got her and even she was bigger than that! (9 inches at 9 months, 45 grams) Are you counting the tails too? For the record, they can still grow given proper food and lighting, but they'll probably never be as big as a dragon that had had proper care from the begining. (After a month of proper care, Miss Priss has grown about 2 inches and is now 60 grams)