Bearded dragon help!!?

Right please dont lecture me as i know it was fair to my beardie but due to not having enough money my beardie was in a 3ft tank for a year. Hes grown ofcourse but not as big as most. Now i have a 5ft7in tank will he grow to full size??
Update: I have done hes now in a 5ft 7in tank which is bigger than average
Update 2: *wasnt fair sorry :S
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