I can't say for sure, because KC was 13lbs. at birth, she has largish women on her dads side but fairly small people on my side. Her Dad is 6ft.2 and I'm 5ft.2,my weight is within the limits Dad's is within 15lbs. Both my other daughters are 5ft. and 5ft.2, ages 17 and 14. KC's bone age is about 10 yrs. she is 4ft.8 and weighs 105. Honestly she looks heavy, but her appetite is enormous too. Our 14 yr. old weighs 111, and looks rail thin. I had taken Prednesone for allergies(never again) and gained 15 lbs. so I would lean toward the idea that the steroid does have alot to do with weight and appetite. Just adding to the idea. I forgot, KC is 11years too.