Goldbug Collection’s CZ Life Ring Stud Earrings 18K gold-plated brass, cubic zirconia stones, white enamel Diameter: 12 mm Post and butterfly backs Care: To keep your Goldbug pieces shining their brightest, please do not shower, swim, or sleep while wearing them, and keep them away from sunscreens, lotions, and perfumes. To clean your pieces, rinse with warm water and gentle soap. Like our bug friends, sadly, costume jewelry doesn't live forever!