Your child's age group is based on birth year and is calculated in the Fall at the beginning of the school year.  Spring season's age group would be the same as what the child was for the fall season.

U13 through U19 play 11 vs 11 (TCYSA League)

U11 through U12 play 9 vs 9 (GHFYSA League)

U09 through U10 play 7 vs 7 (GHFYSA League)