This sparkling blue belly ring is fabricated with solid TITANIUM 6ALV-ELI (Grade 23) IMPLANT GRADE with matching blue jewel. The top bead size is 4mm and bottom bead size is 6mm. This belly ring is 14 gauge and measures 10mm-3/8 inches .Titanium navel rings are lightweight, corrosion resistant, and less likely to react with bodily fluids! For extra safety your titanium body jewelry can be sterilized in an autoclave.