For the One Who Wants MORE than A Plain Rubber Ring. Timeless. Sleek. Classy. The KAUAI Timeless Elegance Collection Features Featherweight Comfort Technology to Lightly Hug your Finger. Intricate Trademarked Design, created by World Renowned Silicone Artist & Sculptor Donna Lee Originals. NON-TOXIC SAFE SILICONE BAND In 2015, KAUAI pioneered the use of 100% Medical Grade Pure Silicone for all of our rings to ensure Optimum Safety and Quality. Our Proprietary Safe Silicone is Hypoallergenic, Non-Carcinogenic, Non-Conductive, and Easily Washes Clean with Soap & Water. Withstands the Toughest Weather Conditions without Cracking or Drying out. Machine Safety Approved to Save Your Fingers From Injury. KAUAI rings will stretch before breaking away at 43 pounds of pressure. Heat resistance is rated up to 400 degrees without melting or distorting shape Perfect for Weightlifting, Hiking, Camping. Exercise at the Gym, Military, Doctors, Nurses, Healthcare Workers, & Electricians, Factory Workers, & FireFighters True to Size according to the National Jewelers Industry Standard To ensure a proper fit, your silicone ring should be able to spin on your finger, and yet not fall off when you shake your hand. Measure inside ring (side to side) for diameter. Size 4 = 15.3mm diameter Size 5 =15.7mm Size 6 =16.5mm diameter Size 7 =17.3mm Size 8 =18.2mm diameter Size 9 =18.9mm Size 10 =19.8mm diameter Size 11 =20.6mm Size 12 =21.3mm diameter Size 13 =22.2mm GOT ARTHRITIS or SWOLLEN KNUCKLES? KAUAI Silicone will Gently Stretch Over Joints Before Returning To Original Size. FOREVER RING REPLACEMENT POLICY: We believe in providing amazing service and quality products, so each Kauai Ring comes with a Lifetime of Quality Policy with Lifetime Replacement for Broken or Damaged Rings.