304 Stainless Steel Stud Earrings, Hypoallergenic Earrings, Round, GoldenSize: about 18.5mm long, 7.5mm in diameter; 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.