Thank you for viewing. This is a leather bracelet. The clasp is a surgical stainless steel (304) double ring buckle. This structure, which tightens leather or fabric through two O-rings, is often used for belts, bracelets, and bag straps. It's a type that secures with friction, without using holes for the clasp. Unisex (for both men and women) Size: Free (Fits wrist sizes from 15cm to 18cm) The photos show the bracelet worn on a 17cm wrist. Leather: 10mm O-rings: 21mm Materials: Genuine leather (cowhide) Clasp: Surgical stainless steel (304) Colors: Leather: Brown Clasp: Silver Please feel free to ask any questions.