Jooyi&reg; Convenient Metal Ring Measure Tool Finger Sizing Ring Sizer Gauge Mandrel Stick has Sizes 2 to 15 in 1/4 Size Increments Great for Jewellers, Ring Makers, Hobbyists, Craftsman etc This is a new metal finger gauge. With this finger gauge you will never have to look for a gauge again. Great for use on glass showcases. Grooved on one side to prevent chipped stones. This is great to give to customers or stock your store and save money.