These Tiny Black Round Cubic Zirconia Earrings are the perfect accessory for any occasion. Crafted with high quality materials and craftsmanship, these earrings are sure to last. The flat screw on back is made of 316L stainless steel, and is nickel and lead free, making it hypoallergenic and rust resistant. The shiny smooth finish and 20 gauge post make these earrings comfortable and stylish. The post is 6mm long and the CZ measures approx 4mm. These earrings are perfect for lobe, cartilage, and tragus piercings, and are suitable for all ages and genders.