Thank you for viewing. This is a braided leather bracelet with a surgical stainless steel (304) clasp. Surgical stainless steel, such as 316L, 304, and 202, is a low-allergen material also used in medical tools like scalpels and scissors, as well as in high-end watches. It is a special type of stainless steel with excellent properties, including rust resistance, corrosion resistance, oxidation resistance, and heat resistance. Materials: Braided leather (genuine leather) Clasp: Surgical stainless steel (304) Sizes: Total length approx. 18cm (suitable for wrists around 16cm) Total length approx. 20cm (suitable for wrists around 18cm) Total length approx. 22cm (suitable for wrists around 20cm) Total length approx. 24cm (suitable for wrists around 22cm) (Example: If your wrist is between 15.5cm and 16.5cm, a total length of 18cm will fit.) Please specify your size after purchase. If no size is specified, we will send the 20cm length. Thank you for your understanding. Braided leather: 3mm Colors: Leather: Black Metal: Gold Please feel free to ask any questions.