Is 8 stone too heavy for a shortish, slim girl of the age of 15?

I'm 15 and I weigh 8 stone.. I'm one of the littlest in my year group (most 11/12 year olds+ are taller than me) and one of the youngest lol! (I'm a later July baby!) and I'm a slim/average body type.. I'm not sure but i think I have quite thick bones, but I have a friend who is loads taller... show more I'm 15 and I weigh 8 stone.. I'm one of the littlest in my year group (most 11/12 year olds+ are taller than me) and one of the youngest lol! (I'm a later July baby!) and I'm a slim/average body type.. I'm not sure but i think I have quite thick bones, but I have a friend who is loads taller than me, and shes about as thin if not thinner than I am.. but she only weighs 7 and a half stone.. so I was just wondering, is 8 stone too heavy or at least over the average for a 15 year old girl who is about 5 foot tall?? Thanks everyone x
Update: Yes, for those of you who don't know, weight is measured in "stone" in Britain. I think its something like 14 pounds to a stone.
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