Fly away with this modern version of wings. This belly button ring will be a great conversation piece. This is an adorable belly button ring with a 316L high grade surgical steel shaft and a .925 sterling silver butterfly design in your choice of blue, red, green, or yellow. The externally threaded top ball size is 5mm. This navel ring measures 14 gauge and 10mm- 3/8 of an inch. Entire piece is nickel free.