20x Silver Plated Metal Stud Earring Findings 4mm x 13mm. 10 pairs of small stud earrings with a loop for attaching drops or dangles (hole is approx. 1mm in diameter). 4mm is the diameter of the stud, and 13mm the overall length front to back. Post is 11mm in length. Supplied with rubber back stoppers - which are pretty utilitarian. If you prefer metal backs, we sell these separately under code 01797-001 - or click on the image shown. Lead free.