The Lovery Carabiner Heart Charm Holder Necklace is in 14K Yellow Gold with an chain length of 18 inches. The heart measures 20 millimeters - 0.78 inch. Each link is approximately 9 x 4 millimeters - 0.35 x 0.15 inch. There is no clasp in the back. The necklace opens from the charm holder piece.