The most reliable way to determine your ring size, is to be measured using ring sizing rings at a jewellers. Be sure to be measured using a sizer of approximately the same band width as the ring you would like to wear, as the width can affect the size quite a lot.
Alternatively, you can use a ring sizing belt, which is available in my shop. Ring size gauges are available in my forged ring shop.
All Glasswing rings are measured by the standard British (Wheatsheaf) scale, however I can convert the size for you if you only know your country's system. The measurements below are for a rough guide.
If you have any difficulties at all with working out your required ring size feel free to contact me and I will be pleased to help.
Conversion chart for British (Wheatsheaf scale), European and USA ring sizes, with inside circumference measurements.