Unique Nipple Rings. This nipple ring features an Abstract Butterfly shield finished with several gemstones. This nipple ring comes with a 14 gauge barbell but will also easily fit a 16G or 18G barbell. Barbell Size: 14 Gauge (1.6mm) Barbell Length: 5/8" (16mm) Nipple Shield Diameter: 5/16" (8mm) Brand: FreshTrends Age: Adult Condition: New