5 mm (0..23 inch) Custom Designer "CELTIC INFINITY KNOT STAR FLOWER" .925 Italian Sterling Silver Small Post Stud Earrings Fashion for Unisex, Women, Teens, Girls - Nickel Free (Pierced Ears) METAL: .925 STERLING SILVER STYLE: "CELTIC INFINITY KNOT STAR FLOWER" Stud Earring DIAMETER: 5 mm (0..23 inch) STEM POST: PUSH BACK with Friction-Back A MUST HAVE FOR ANY EARRING COLLECTON!