Children's (either gender) age 12 doesn't sound very big. I used to buy girls' clothes as a student but usually age 13-14. They probably offer the kids' sizes for kids who aren't big enough for the adult sizes. Sounds like a women's 8 or 10 would fit you, but the 10 might be more comfortable for running.
no subject
Sounds like a women's 8 or 10 would fit you, but the 10 might be more comfortable for running.