These bell earrings are made of the jingle bell charms. This bell does ring. The bell charm and earwires are made of antique brass plated base metal. These earwires are hypo-allergenic and nickel-free. There are two different sizes of bell for you to choose, 11.5mm and 13.5mm. The size of 11.5mm bell earrings is 37mm long. The size of 13.5mm bell earrings is 40.5mm long.