We use the 6" digital calipers (#69-063) to measure nearly every one of our new products! It converts millimeters to inches (and vice versa) with one click. For a less expensive, and almost as precise option, try the #65-100 brass measuring gauge.
EURO TOOL's pocket wire-gauge tool is s must-have for beaders, wire wrappers and jewelers. It accurately measures wire and sheet metal from gauges 34 to 8, and show both millimeter and inch equivalents for each gauge.
Cut ring stock to size easily with the Whaley Sliding Ring Gauge (and your favorite saw). It factors in the thickness of the stock to determine the correct blank length, and works for both right and left handed users. No more complicated formulas or guessing!