10 Inch Arms For a 14 Year Old?

I'm 14, Small Boned. My wrist is 6 inches and I bench 30 lbs, 1 set with 30 reps. I also do pec fly's with 10 lbs and i do bicep curls with a barbell which has 20 lbs on it. My Height is 5.8 and I weigh 115 with a BMI of 7.26 which means I'm about 9 pounds fat. I just measured my arms yesterday (not flexed and straight) and they measured 10 inches around. So is 10 inches small, is it possible to get 12 inch arms or even 14 over time? If so how long and how much should i lift?