This is a cool and sexy Nipple Chain. This item comes with two (2) 316L Surgical Steel Captive Bead Ring chained together by a .925 Sterling Silver Chain. The sizes of the captive bead rings available are 14 gauge or 16 gauge. Also, the diameter available for the captive bead ring are 10mm - 3/8 of an inch, or 12mm - 1/2 of an inch. The chain length is 13 inches with thickness of 1.6mm.