About this item [Compatible] The elastic silicone ring protective cover compatible with Gen 2/2 air. Note: Only Cover, smart ring not included. [Fit Size] Please check your smart ring size and choose fit ring cover size. S for ring size 6/7/8, M for ring size 9/10/11, and L for ring size 12/13/14. [Perfect Protection] The silicone ring protective cover completely wraps around the Gen 2, helping to minimize scratches and damage to the ring during daily use or exercising. [Easy to Clean] This silicone ring cover is washable. When your ring protector case cover is covered in dust, you can simply clean it with water and wipe it dry with a soft cloth to restore cleanliness. [Easy to Use] This Smart Ring Cover is very convenient to put on and take off and can be charged without removing the protective case cover. Dimensions: 3.43 x 3.19 x 0.55 inches.