UTHE RING - This particular ring boasts a contemporary flat band, slight comfort fit and a matte finish. The matte finish is extremely durable. The outside texalium is a silver with the black carbon inside. RING SIZE- All of our rings can be made from size 4-16 including half sizes. We can make the band width from 4mm-10mm. Please leave us a note in the "Note from Buyer" section of the order to confirm your ring size and band width you would like to receive. PROPRIETARY NASA TECHNOLOGY IN EVERY RING - Having decades of experience with carbon fiber and composites, we invented a unique process for NASA that we use in every Core Carbon Ring made. The process allows for an extremely strong, lightweight, comfortable, and truly unique ring. HANDCRAFTED IN THE UNITED STATES - Each ring is professionally and individually handcrafted on the Space Coast of Florida. SATISFACTION GUARANTEE - We want you to be completely satisfied with your new ring. If you are not for any reason, please contact us. We will be happy to exchange until the ring is a perfect fit or refund you for your order.