Flexzion Ring Sizer Mandrel Finger Sizing Measuring Stick Jewelry Accurate Tool Metal Size US 0-13 with Gauge Set of 27 pcs Circle Models in Silver 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 Pc ring sizer set is made of stainless steel Fine workmanship and high quality Durable and does not rust Great for use on glass showcases