Our 591 locking d ring collar is made of 7/8 oz leather. The collar is 2-1/8" wide , and has a black synthetic fur lining. It comes standard with 4 d-rings for attaching any of our wide selection of leashes. This leather collar also has a locking buckle which can be used with any of our wide selection of locks. It is very adjustable and will fit just about anyone, male or female comfortably. And as with all of our leather collars, this d ring collar comes with our Dungeonware® lifetime guarantee and will be shipped to you very discreetly.