These earrings are made from a real, previously fired 40 S&W bullet casings that have been crafted into unique stud earrings accented with a Swarovski® crystal. Use the color chart to select your preferred color. The posts and metal backings are made from surgical steel. Each earring measures approximately 10mm in diameter and each crystal measures approximately 4mm in diameter. 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.