These are Ohm Dangle earrings. The Ohm charm is made of lead free, nickel free zinc alloy. And the charm measures about 3/4" in diameter. The total length of the earrings including the hook is about 1 3/4". The hooks are made of stainless steel which is good for people with ear sensitivities...If you would like the hooks to be sterling silver...just message me as soon as you place your order and i will accomodate you. Just make sure you message me right away as i send out orders within one business day. Beautiful earrings for yourself or as a gift..