@Xenoverse Yup, Grade School 6-12, Middle School 13-15. That's on paper, then you add actual birth days and you can be 12 on first year or 16 on third.
They're second years, so she's 13-15.
She's definitely over the AVERAGE of a 14yo, but it's not THAT rare. At 12 I had a classmate that was even bigger in the chest department, so...