S:Suit for shoulder width 36-39cm(Suit for weight 45-60KG). M: Suit for shoulder width 40-45cm(Suit for weight 60-75KG). L: Suit for shoulder width 46-51cm(Suit for weight 75-90KG). Crossover adjustable removable strap,Provides firm support for shoulder and back.Perfect fit the natural shape of the shoulder.
eBay