These tiny screw-back stud earrings feature a delicate white opal inlay for a unique and elegant look. Crafted from 925 sterling silver and opal, they are nickel-free, lead-free, cadmium-free, and hypoallergenic, making them ideal for sensitive ears. The studs measure 0.16 inches (4mm) in diameter with a 20-gauge post (0.9mm thick). The post length is approximately 7mm, which may be too short for thicker earlobes. Designed for most women, the secure screw-back mechanism ensures a snug fit without irritation or slipping. We offer a 100% money-back or exchange policy within the return window. If you have any concerns, feel free to contact us for assistance.