SIZE CHEST WAIST UK SIZE US SIZE
XS 62cm 53cm 4-6 0-2
S 66cm 57cm 8-10 4-6
M 70cm 61cm 12-14 8-10
L 74cm 65cm 14-18 12-14

If you fall between 2 sizes we recomend sizing down for a more snug fit, and sizing up for a looser fit.