Ring Mandrel

All stainless steel ring mandrels in 8 sizes
Overall Mandrel Length = 11-3/4" (298.45mm)

The most common women's ring sizes are between 5 and 7
The most common men's ring sizes are between 8 and 10-1/2

21mm Diameter, US Size 11-1/2
20mm Diameter, US Size 10-1/2
19mm Diameter, US Size 9
18mm Diameter, US Size 8
17mm Diameter, US Size 7
16mm Diameter, US Size 5-1/2