Is a size 3 fat....?

For 13, you're thin but healthy. If you keep this same weight when you are 15, you will be underweight. Soon, you will be adding curves with puberty, which makes you weigh more.

Please mention your concern to your doctor so that your doctor can help you before this turns into an eating disorder.

No!! The average size for an American women is 14. FOURTEEN. I know you're only 13 years old but you're not going to grow TOO much more, and you're still ELEVEN SIZES under average. Still, that's kind of off topic. Right now a girl your height should weigh 115-125 pounds. So technically you're underweight. And don't forget sometimes weight can just be muscle. You're not fat at all, you're actually really skinny!

Yeah all of the 13 year olds at my school are either a size 00, 0, or 1

No. I'd say your slightly under average actually. I'm 14, 5'1, and 91 and a size 00. I'm considered small. So I would say you're just under average. Don't worry! If your concerned about your weight, start running! I joined the cross country team :)

That's not fat at all. When you get to high school in a year you'll be one of the smallest.

Your not fat or overweight just average. Your grand were you are and it shiundnt matter what size others are.

No, you are too skinny already. You should weigh about 115.

No you're an acceptable weight. :)

Maybe if you're 3 feet tall.

not fat and not skinny