Tarnish Resistant 304 Stainless Steel Big Hoop Earrings, Hypoallergenic Earrings, Stainless Steel ColorSize: about 64~66mm in diameter, 2mm thick(12 Gauge); pin: 0.7~1.3x0.68mm.Hypoallergenic Earrings: Made of Stainless Steel, our earrings are nickel free, which are gentle to skin. These earrings are ideal for sensitive ears.