Nice heavy quality! 3/4" across. Hinged and easy to insert and, when clicked closed, stay secure. The smaller insert section is just the right width to clear the lobe, leaving the look of a small gauge, as opposed to a dangling earring. I wear them as default, not removing daily, have had them about 2 weeks, and they are staying shiny. Good purchase for this biker chick, but would also look right on my husband.