Compatibility: Our silicone cover is specifically designed to protect the Oura Ring Gen 3, with an elastic material that accommodates all ring sizes Universal Fit: This elastic case is suitable for all ring sizes. Please select size S for ring sizes 6 to 10, and size M for ring sizes 11 to 13 Comprehensive Protection: The sleeve fully covers the smart ring, providing essential protection during physical activities such as workouts, weightlifting, sports events, or any situation where finger impact is likely Easy Application: The slim and stretchy case effortlessly slides onto the smart ring, adding minimal thickness while offering maximum protection Customer Service: If you encounter any quality issues, please don't hesitate to contact us for a replacement at any time Our silicone cover is tailor-made for safeguarding the Oura Ring Gen 3, featuring elastic material that adapts to all ring sizes. With size options S for ring sizes 6 to 10, and size M for ring sizes 11 to 13, it ensures a universal fit. This sleek case provides comprehensive protection, shielding your smart ring during workouts, sports events, or any activity prone to finger impact. Its slim and stretchy design allows for easy application, adding minimal thickness while maximizing protection. Plus, our dedicated customer service is ready to assist you with any quality concerns, offering replacements as needed.