These tiny opal earrings feature screw-back studs inlaid with white fire opal for a unique and elegant look. Perfect for women with pierced ears, they are hypoallergenic, made of 925 sterling silver and opal, and free from nickel, lead, and cadmium, making them safe for sensitive skin. The stud earrings measure 0.16 inches (4 mm) in diameter with a 20-gauge (0.8 mm) post thickness. The secure screw-back design ensures a snug fit without pressure on the earlobes, preventing loosening or loss. We offer a 100% money-back guarantee or exchange within the return window. If you have any concerns, feel free to contact us for assistance. Ideal for all women, these earrings combine beauty, comfort, and security.