Sports-bra-size-chart

Size Chest
XS 31-32
S 33-34
M 35-36
L 37-38
XL 39-40
XXL 41-42
XXXL 43-44

A - BUST
Take your measurement at the fullest part of the chest.
B - WAIST
Take your measurement at top of hips and base of rib cage.