Square Stud Earrings Handmade in the USA using gold fill, rose gold fill and sterling silver These studs are adorable and easy to wear. Choose from two different sizes! You also have your choice of metal (14k gold fill, rose gold fill or sterling silver) and finish (hammered or brushed). You can't go wrong with these perfect studs! Approximate sizes: Extra Small - 3/16" Small - 1/4" All studs have sterling post and ear nut.