Made by brass,Plated silver plated ,3mm Turkey gen cowhide leather,.Measure the Inner circumference SIZE S:16cm(Suit for Wrist wrist circumference 14.5~16cm )/M:17.5cm(Suit for Wrist wrist circumference 16~17.5cm ) /L:19cm(Suit for Wrist wrist circumference 17.5~19cm)