MOJUN Ring Sizer Mandrel Finger Sizing Measuring Stick Jewelry Accurate Tool Metal Size 1-13 with Gauge Set of 27 pcs Circle Models in Silver There are 4 kinds of measurement on the stick, metal ring stick measure tool with US sizes of 1-15 and European sizes of 41-76. Ring sizer mandrel is made of aluminium material. It is lightweight and easy to handle. The 27 pcs ring sizer set is made of stainless steel. The ring sizer is used for testing the size of your fingers, while the mandrel is for determining your ring size. 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. It's great to give to customers or stock your store and save money.