20x Bronze Finish 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 basic utilitarian rubber back stoppers. We sell metal backs separately under code 01962-001 - enter this into the Search box, or click on image shown.