This pendant is plated in Rhodium and hung from an 18" sterling silver chain. It measure approximately 1" around. You're sure to love this new necklace just as much as we do! It is also available in gold. - Rhodium Plating, 18" Sterling Silver Chain. *Rhodium plating causes the jewelry to have a grey-silver appearance. It is hypo-allergenic, nickel free and will not tarnish.