Tarnish Resistant 304 Stainless Steel Ear Studs, Hypoallergenic Earrings, Stud Earrings, Heart Lock, Stainless Steel ColorSize: about 10mm wide, 11mm long, 1mm thick; pin: 0.8mm.Hypoallergenic Earrings: Made of Stainless Steel, our earrings are nickel free, which are gentle to skin. These earrings are ideal for sensitive ears.