This is an out of this world navel ring with a 316L high grade surgical steel shaft and a UFO with cubic zirconia stones in your choice of clear, light blue, dark blue, green, purple, red, pink, or turquoise. 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.