The Nautilus Shell Flat Back Stud is a miniature celebration of the sea. Carefully refined to capture the natural texture and shape of a shell, it's a tiny piece packed with incredible detail. This listing is for a single ASTM F136 implant grade titanium push-pin flat back stud. Measurements: 18 GA (1mm), though compatible with most 16 or 20 gauge threadless labret posts Post is 1/4 inch (6mm) in length, with a 4mm disc on back. Approx. size of design, is 4.4 x 5.7mm Check your own ear measurement for placement before ordering Custom designed and created by Cords Club. Materials: 18K PVD Gold Plated ASTM-F136 Titanium, polished ASTM-F136 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.