Size - Chest (Inches)
XXSB - 24 Ages 5-6
XSB - 26 Ages 6-7
SB - 28 Ages 7-8
MB - 30 Ages 8-9
LB - 32 Ages 9-11
XLB - 34 Ages 11 - 13
XS - 36 Ages 14 - 16
S - 38 Ages 16+
M - 42
L - 44
XL - 46
2XL - 48
3XL - 50