Tarnish Resistant 304 Stainless Steel Ear Studs, Hypoallergenic Earrings, Textured, with Ear Nuts, Round, Stainless Steel ColorSize: about 8mm in diameter, 20mm long; pin: 0.7mm.Hypoallergenic Earrings: Made of Stainless Steel, our earrings are nickel free, which are gentle to skin. These earrings are ideal for sensitive ears.