18k Gold Filled 4" Big Plain Hoop Earrings. With so many options to style yourself, you find here a gorgeous example of a large 4" or 105mm size made from fine 18k Gold Filled. Hypoallergenic + Nickel Free Tarnish Resistant for long lasting beauty. Wear our earrings on the beach, while bathing or in the pool. 3.5mm thick 4" or 105mm Diameter. Made in Brazil.