Each ring is unique, made from buffalo horn, lacquered then varnished and dried naturally. Dimensions vary due to handcrafting. -XS: 56-59.5 mm – Suitable for very narrow wrists - S: 60-62.5 mm – Ideal for narrow wrists - M: 63-64.5 mm – Suitable for standard wrists - L: 65-66.5 mm – Perfect for wide wrists - XL: 67-68.5 mm – Recommended for very wide wrists - XXL: 69-71.5 mm – Designed for particularly thick wrists The band is 6 mm thick. The appearance and color of the horn varies depending on the animal. The horns come from buffaloes consumed for their meat, thus respecting an artisanal recycling approach in Vietnam.