Pendant size: 13mm x 13mm Chain size: 18" Hallmarks: "Tiffany & Co. Peretti 925 Spain" on the chain. and attached to the pendant, cannot be removed No longer in production, the piece is perfect for the collector! I provide a 100% guarantee that all items in my Closet are authentic. If for any reason you are not satisfied with the authenticity of your purchase, I will provide a full refund.