Enameled Chestnut Horse Stud Earrings are sterling silver-plated and horses have a metallic finish. Designed by artist Marilyn Grame. Each color one these galloping horse stud earrings is hand-painted and then kiln-fired to turn it in to a work of art. Zarlite by Zarah. Materials: Enamel, Sterling Silver-Plated Metal (Nickel-Free) Back Finding: Post with Butterfly Clutch Size: .38 inch long x .63 inch wide (9mm long x 16mm wide) Zarah Chestnut Horse Stud Earrings arrive in a gift box ready for gift giving (even to yourself!).