The sturdy, solid aluminum ring sizing mandrel from Hobby Tool Supply features millimeter diameter and circumference scales to show length of material needed to make specific sizes. The mandrel is flat on two sides which means it’s perfect for sizing rings with stones or decorations. Each flat side is marked for European and American sizing. American sizes range from 1 to 15 and are marked in quarter increments. The mandrel is 10″ in length with a 2″ handle.
- Dual sided measuring with 4 measurement scales
- Marked for European and American sizing
- Heavyweight aluminum construction
- Measures ring sizes from 1 to 15, in 1/4 size increments
- Measures ring size diameters in millimeters from 13mm to 24mm