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 affect 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. We also offer free exchanges until you have the perfect fit! Proprietary Nasa Technology in Each 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 on the Space Coast of Florida - Each ring is professionally and individually handcrafted giving you a one of a kind piece. Glow - We use a Non-toxic strontium aluminate infused in our resin for the glow. Glow times vary depending on charge time and sunlight exposure/UV exposure. When charged with UV light for 5 to 10 seconds, the ring will glow strong for a couple of minutes then the glow will dim for one to four hours. It is necessary to be in a dark or dimly lit space to see the full affect of the glow. The ring can be recharged for 10+ years. 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 the ring until it is a perfect fit or it can be returned for a refund. Carbon Fiber Ring with Gibeon Meteorite inlay in a high gloss finish. This ring has a traditional rounded band, Gibeon Meteorite inlay, and a high gloss finish. The Meteorite inlay is infused with glow powder and will glow an aqua color. The high gloss finish gives the ring a beautiful depth magnifying the meteorite shavings. While the gloss finish is durable for everyday use, the finish will scratch similar to how gold will. If you are rough with your hands, we suggest going with one of our matte finish rings that are more durable. The ring will ship in a ring box. All of our rings are handcrafted in the USA with a Lifetime Warranty.