Add On Charm Belly Ring. Comes with Jump Ring So You Can "Add Your Own Charm" and Create Any Type of Belly Ring You Want. Add On Navel Rings are Great for Body Jewelry Designers and Manufacturers.. Specifications: 14 Gauge (1.6mm). 7/16 Inches (11mm), 316L Surgical Grade Stainless Steel, Genuine Cubic Zirconia, Prong Set Gem, Jump Ring