This necklace is made using a real, previous fired brass 9mm bullet casing. The bullet pendant measures approximately 12mm in diameter and is accented with a Swarovski® crystal that measures approximately 4mm in diameter. Use the color chart to select your preferred color. Since real bullets are used manufacturers may vary and bullets may have unique markings on the casing from being fired. Dimensions listed are approximate. Sizes, colors, and other characteristics may slightly differ due to the handmade nature of our products..