Ribcage charm is Tibetan silver, a zinc alloy metal which is lead and nickel free. Ribcage charm measures an approx 30x40mm's Heart shaped keychain is approx 31.5mm's Charm is attached with a strong jumpring Keychain is supplied in a cute organza gift bag, ready for gift giving! Personalisation available by adding a birthstone or initial charm, please just message me for a custom listing.