Premium quality 30 Year AA Sobriety Medallion in Elegant Marble Design With Caribbean Aqua Glitter and Blue and Gold Plated design . Serenity Prayer on the back and designed with gold plated lettering around the rim and a textured center under the fill. 33mm Diameter and 3mm Thickness which gives this coin a better "weight" and "feel". It really feels like a premium coin yet isn't heavy in your pocket. Comes with a vinyl protector envelope. If you need a keychain holder search Amazon for B01GLOWDJY which is the ASIN for the holder that works with this item.