Green Aluminum Ring Gauge Mandrel Jewelry Sizing Stick This is a new graduated green aluminum ring mandrel This is an essential tool for the jeweler, goldsmith, silversmith and metal worker This elegant colored metal ring stick can be used to determine the size of rings Has sizes 1 to 15 in 1/4 size increments by Us standards Also has 1 - 36&amp;41 - 76 universal sizes on the back