I wish every Jeweler used Durston's PrecisionFit mandrels and ring sizers. Sure we would lose some money on sizing repairs from people who buy junk online and get the wrong size. The amount of time we have to explain to people that yes, finger sizes are standardized but the manufacturers of most ring sizing equipment do not have high enough quality control to keep their products on the standard which is why we use Durston ... blah blah blah. It would be so much easier if the standards were actually used.
From Durston's website:
Durston Tool’s PrecisionFit™ technology is the most accurate ring sizing system in the World, guaranteed to provide a perfect sizing between mandrels and rings. The USA’s favourite ring mandrel range, with over 20,000 sold in the USA in 2019 already! PrecisionFit™ is the leading ring sizing system globally, used by individual jewellers through to large, multiple chains. Don’t settle for less than PrecisionFit™.
