Sterling Silver Halo Stud Earrings of Swarovski Zirconia Encircling Swarovski Crystals Two sparkling Swarovski Crystals surrounded by shimmering Swarovski Zirconia Halo measures 9mm ( 3/8 inches) .925 sterling silver settings and backs Two sparkling Swarovski Crystals surrounded by shimmering Swarovski Zirconia Halo measures 9mm ( 3/8 inches) .925 sterling silver settings and backs