Size Guide 'to fit' (chest/inches):
JnrSM (Age 6-8): 26-28"
JnrMED (Age 9-10): 28-30"
JnrLRG (Age 11-12): 31-34"
Youths (Age 13-14): 34-36"
N.B: these shirts come up larger than other brands/high street sizes
Consider a size down from your usual size if you prefer a more fitted shirt