All day and all night, the Mini Organic Ball Stud Earrings are ready for wherever the day takes you. 18K Vermeil; recycled sterling silver with 18K-gold plate Ball measurement: 2mm Post back Also available in recycled sterling silver #KE-5120S, $25 Item #KE-5120G Helpful info: Keep jewelry away from water and chemicals. Remove during physical activities. Store separately in a soft pouch.