Made of thicker, 3,5 mm genuine leather with suede lining inside. 3,8 cm wide with an adjustment option, which we solved with the traditional buckle. We fitted it with 2 rings, one in the front and one in the back. Their diameter is 5 cm. The shoulder straps wide is 1,5 cm. We make it after specifying individual sizes, so please enter your bust size according to the attached photo! During production, we make sure that the specified size is adjustable.