PRODUCT DETAILS Tarnish Resistant SIZE 37mm. Thickness 4.3mm. MATERIAL 24K Gold-bonded over Brass. CLOSURE Butterfly back. Hypoallergenic. DESIGNER NOTE This updated new design is going to be your new everyday hoop. The gold, sleek design will play up any outfit and add sophistication to your look. STYLE TIP: Wear our Chunky Tube Hoops with our Black Crystal Huggies for a complete ear party look! Handmade in the US.