RING - This particular ring boasts a contemporary flat black band, standard fit, and a durable scratch resistant matte finish. The ring boasts full carbon fiber construction in the classic carbon fiber twill pattern. With the ring being made out of 100% carbon fiber this ensures a lightweight feel to the point of being almost unnoticeable. 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. SIZING - All of our rings are made according to US Sizing and are a standard fit ring. Please keep in mind, the band width can effect how the ring will fit. The wider band widths will sit on the fattier part of the finger making it feel tighter. We recommend with a 9mm or 10mm band width you go up half size from what you normally wear. 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 it can be returned for a refund.