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 person’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.
Standardized scale for rings. Standard US range from 0-13 with 7 being the average size, UK has a A-Z scale with N being the average size.
A measurement of finger size, generally found by measuring both the finger that the ring will be worn on, as well as the knuckle that the ring must slip over. Ring sizes are generally between 4 and 13, with 6 as the average woman's ring size.
The measurement of how large a ring needs to be to fit securely on a person’s finger. Traditionally the average ring size of a woman was 6 and a man 10, but this has been slowly increasing.
A measurement, generally somewhere between 4 and 13, that is determined by the diameter of the finger which will wear the ring, that permits a ring to be easily slipped over the knuckle. To determine your ring size, see our ring guide.
Rings are sized using a graduated cone (a mandrel) with markings denoting the ring sizes. The ring is put on the cone and its size is read where it fits snugly on the cone. To size a finger, a finger-ring gauge is used. The rings are marked with their size and the person determines which one fits well. Another, less accurate method, is a cardboard card with cut-out holes marked with the ring sizes. Sizes in the US and Europe are numerical; sizes in the UK are alphabetical. To determine the ring size of a finger using the circumference of the finger, or to determine the size of a ring given its diameter, the formulas are: System Formula using Circumference Formula using Diameter USA Circumference in mm = 36.107 + (2.5890*Ring Size) Diameter in mm = 11.4931 + (0.8241*Ring Size) Europe Ring Size =Circumference in mm Ring Size = 3.1416 * Diameter in mm UK Circumference in mm = 36.667 + 1.2368*Ring Size(where 1=A, 2=B, etc.) Diameter in mm = 11.6713 + [0.3937 * Ring Size(where 1=A, 2=B, etc.)
A measurement of how large the ring needs to be to fit on a person's finger. The average ring size for women is 6. The average ring size for men is 10.