This True Size precision calibrated ring stick delivers consistent, dependable results from start to finish when sizing rings. This 13 steel mandrel
True Size Ring Mandrel Size 1 to 16
Wolf Sanding Mandrel 1/2 Large
Stainless Steel Finger Ring Settings Jewelry Findings Components - 4pcs/box - Aliexpress
Mandrels & Gauges – Stairway Studio
Steel Ring Mandrel with Groove Sizes 1-16, FORM-0220
Bezel Bending Tool
Wood Ring Clamp
Oval Bezel Mandrel - UK
Wire Bending Mandrel - Singapore
Pepe Tools 1-16 (US Sizes) Graduated and Grooved
Grooved Ring Mandrel / Ring Sizer in U.S. sizes 1 - 16 in 1/4 increments
Pepetools Gold Standard Steel Ring Stick with Groove from Kassoy
Mandrel Ring Grooved 1-12 - Thunderbird Supply Company - Jewelry Making Supplies
PEPETOOLS® “Gold Standard” - Steel Standard