Quick answer, educated or guess, please answer. thanks!?

[lou-lou]

Please tell me if i am under-weight.

11 year old girl
100 pounds
5 foot 3 inches

15 year old girl
115 pounds
5 foot 8 inches

 

[Mischa]

the 11 yr old is fine, and the 15 yr old is a little on the thin side.