This is a fabulous lip ring is made with 316L high grade surgical steel and a dark blue jewel. The 14 gauge comes with a 4mm bead and 16 gauge comes with a 3mm bead. The comfortable flat end measures 4mm. The size is available in your choice of 14 gauge or 16 gauge and 8mm-5/16, 10mm-3/8, or 12mm-1/2 of an inch. The entire piece is nickel free.