Size Reference
 M:chest 60~67cm, weight 46.5~51.5kg
 L:chest 68~73cm,  weight 52.0~60kg
 XL:chest 77~80cm,  weight 60.5~70kg
XXL:chest 83~87cm,  weight 70.5~75kg
XXXL:chest 90~93cm,  weight 75.5~82.5kg
XXXXL:chest 96~100cm,  weight 83~92.5kg