Silicone rings offer a safe alternative to traditional metal rings or wedding bands. Made from flexible, yet tough and durable silicone, these rings are designed to stretch for a breathable comfortable fit. Rings are skin safe, non-toxic and will keep you safe while working out. No matter the circumstance or activity a silicone ring is a great option to wear on trips and vacations, at work or during exercise and physical activities. Sold as a pair Combo back includes black and grey ring Made from flexible yet tough silicone Designed to stretch for breathable comfort Measurements: Small/Medium (Ring Size 6-8 / Diameter 16.5mm / Weight 0.125lbs) or Large/Xlarge (Ring Size 9-11 / Diameter 19mm / Weight 0.125lbs)