Boys' Youth Clothing Size (8-16 yrs)
Youth Alpha sizes (S-M-L), Boys The Youth Alpha-size System (S, M, L - small, medium, large) is used world wide. Together with the US size system (age) and the EUR size system (height), it is the most used youth clothing size system internationally. Youth alpha size is used from approx. 7/8 years age and up to around 15/16.