Groove Rings Silicone Elastomer Wedding Rings, Breathable, Comfort Fit, 2 Part Design, Funded on Kickstarter Groove Life Silicone rings are designed to be worn snug to your finger. Due to the difference in material, your normal metal ring size may be different from your Groove Life ring size. For example, if you wear a size 8 metal ring, you may want to order a size 7 Groove Life Ring for a more comfortable fit. Likewise, if you wear an 6.5 metal ring, a size 6 Groove Life ring may be a better fit. Groove is also non porous, non conductive, heat resistant, and hypoallergenic. * Width: 8mm or 5/16" + - * Thickness: 2mm or 3/32" + - Weightless Wedding Band and Accessory, Safe For Exercise, Weight Lifting, Training, Yoga, Hunting, Fishing, Hiking, Rock Climbing, Sports, Mechanics, Construction, Cleaning, Etc. Lifetime Warranty: Groove has an UNLIMITED lifetime warranty on all of our rings. Break it, or even stretch it out your covered. Breathable Design * Patent Pending * Medical Grade Silicone You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!