Size Reference
XS:waist 63cm，suitable for weight 47kg;
S:waist 63~67cm，suitable for weight 48~57kg;
M:waist 70~74cm，suitable for weight 58~67kg;
L:waist 76~80cm，suitable for weight 68~77kg;
XL:waist 83~87cm，suitable for weight 78~87kg;
XXL:waist 90~97cm，suitable for weight 88~100kg;