As the name suggests our BellaStrata or "beautiful layers" ring is made from many layers of carbon fiber prepreg machined into a dome shape. Our special machining and finishing processes demonstrate just how stunning a carbon fiber ring can be. The polished finish almost glows! Each ring is manually machined and given a significant amount of individual attention. This ring is .180" / 4.5mm wide. No coatings were used on this ring so we can maintain a high level of durability. We offer this ring is standard sizes 7-13.5 in whole and half sizes.We do not offer 1/4 sizes at this time. If you don't know your size please visit a your local jeweler and get sized. This only takes a few minutes and most jewelers are happy to help you even if you don't buy from them. Please do not guess on your size so that you can start wearing your new ring right away. This ring is made to order and usually takes 2-3 weeks to ship. *Photo is black and white.