Size M has an outer ring of 2.9cm, an inner ring of 2.5cm, a height of 1cm, a net weight of 1.72g, a single package of 2.8g, and a packaging of 127.51cm.Size S has an outer ring of 2.5cm, an inner ring of 2.1cm, a height of 1cm, a net weight of 1.49 grams, a single package of 2.58 grams, and a packaging size of 127.51cm.Multifunctional: Our silicone ring covers are suitable for various sports activities, such as swimming, yoga and surfing, completely covering and protecting your smart ring, ensuring safety and worry-free.EASY TO USE: Thin and flexible, the silicone ring cover shell slides easily onto the smart ring, adding minimal thickness while providing maximum protection.EASY TO CARRY: Our silicone loop cover provides a comfortable fit while maintaining a good grip. The compact size and smart design make it easy to carry and use anytime and anywhere.WIDELY APPLICABLE: With our silicone ring covers, your rings will be convenient and protected. Sizes M and S are available for ring sizes 11, 12 and 13, and 6, 7, 8, 9 and 10 respectively. Very suitable for use.Carefully crafted: Our silicone ring covers are molded on real machines, demonstrating exquisite craftsmanship. Each hole is precisely cut to ensure a perfect fit without compromising design or comfort.Applicable models: For Oura Ring Gen 3Material: siliconePackaging: baggedIncludes: 1 piece silicone case for Oura Ring Gen 3