Ring Size Conversion Chart
You can use the chart below to help you figure out what ring size is best for you. Keep in mind that the size of your fingers will change frequently, often due to weight gain or loss and pregnancy, but can also change size based on external factors such as temperature and time of day. If you were recently (within the last 2 weeks) measured professionally at a jewellers then you can assume that your size hasnt changed, however the best way to know your current size is to measure a ring you currently own (one that fits!) and use that as a guide.
Tip for mobile users: Click on your size in inches to view its equivalent in mm, US/Canada, British, Japanese and Swiss.