Sold as a Single Piece (Top and Bottom) 18g, Titanium ASTM F136, Internally Threaded Labret Post and Flat Stripes Top Gauge: 18g (1.0mm) Length: 3/16"(5mm), 1/4"(6mm), 9/32"(7mm), 5/16"(8mm), 9/32" (9mm), 3/8"(10mm) Back size or Bottton size: 2.5mm (Small back) & 4mm (Big back) Top size: 3mm, 4mm & 5mm Commonly worn in: earlobes, sensitive lobes, cartilage, conch Inner Conch, Internally Threaded Jewelry, Piercing Lip, Stripes Top, Piercing Tragus, Tragus Piercing, Titanium Jewelry, Lip Piercing, Tiny Earrings