Happy Hours - Metal Finger Gauge Exact Ring Size Helper Measuring Stick Sizes 2 to 15 in 1/4 Size Increments Silver Ring Sizer Gauge Finger Measuring Stick Metal Ring Mandrel US Size+31 pcs Ring Sizer There are 4 kinds of measurement on the stick , 1-15 is American type Great for Jewellers, Ring Makers, Hobbyists, Craftsman etc Grooved on one side to prevent chipped stones There are 4 kinds of measurement on the stick , 1-15 is American type. Great for use on glass showcases