How old are you supposed to be if you weigh 100 pounds?

well, actually I'm 90 pounds and I'm almost turning 11 in a month and 3 weeks maybe? but, anyways so I'm 5 foot 1-five foot 2 so i think that when your around 100 pounds maybe 5 foot 3-five foot 5. but actually it doesn't matter.it could be that your parents are tall.well my dads like 15 cm taller then me and my mom's 4 cm taller then me.it could also be that if your gaining more weight but still healthy you can get taller...