This is a special lip piercing jewelry made from high grade solid pink TITANIUM 6ALV-ELI (Grade 23) IMPLANT GRADE with a jewel. The comfortable flat end measures 4mm. The size is available in your choice of 14 gauge and 8mm-5/16, 10mm-3/8, or 12mm-1/2 of an inch. The entire piece is nickel free.