Barbed wire, but make it jewelry. This stud brings just the right amount of rebellion to your everyday look. Wear it solo or integrate it into an entire look. This listing is for a single ASTM F136 implant grade titanium push-pin flat back stud. Measurements: 18 Gauge (front compatible w/most threadless labret posts, 16-20GA) Post measures at 1/4 inch (6mm) length, with a 3mm disc on back.  Approx. size of front piece is 5.3 x 4.7mm.  Refer to listing images to get an idea of the size of the stud on-ear. Check your own ear measurement before ordering. Materials: 18K PVD Gold Plated Titanium, Titanium Care: Water and tarnish proof with proper care. If exposed to salt water, chlorine, or lotions/perfumes, rinse off with cool-warm water and gently dry. When not wearing, store in a dry, cool place. Do not pull, twist, or tug on your jewelry.