By default, ring size for custom opal jewelry is shown as US Ring Size. To convert your local ring size to US size, please click the 'International Ring Sizes' link on the page of the inlay opal ring you are viewing and our ring size converter will pop-up. Just match your local ring size to the US ring size from our chart.
This unit of measure is used to indicate the ring diameter necessary to properly fit a personâ€™s finger.
Proper ring size is based on the diameter of the wearer's finger and the size of her/his knuckle. The most common ring sizes range from 4 to 13. A size 4 ring has a circumferance equal to 46.5mm or 1-13/16 inches. There are many ways to determine a ring size. Click here to learn how.