Ring Size Conversion Chart
Use the chart below for conversion of US and Canadian number sizes to the "Wheat sheaf" system of letter sizes used in Ireland, U.K. Australia, ect. Diameters and circumferences are also given in both inches and millimeters. Please note that these measurements are exact for the American system and approximate for the other sizing scales, since the intervals in each system do not correspond exactly.
Ring sizing gauges and finger gauges as well as published charts do not always agree. Add to this that there are two conflicting methods of reading ring gauges so it is quite common for ring sizes to vary slightly from one workshop or jeweler to another. The ring sizing information presented here is the result of a conscientious study and comparison of various sources and is consistent with the instruments and measuring technique that we use in our workshop.
Celtic Ring designs by Walker Metalsmiths
|Inside||Inside||Inside||Inside||Number Sizes||Wheat Sheaf|
|0.498||12.6||1.564||39.7||1 1/4||B 1/2|
|0.514||13.1||1.614||41.0||1 3/4||C 1/2|
|0.530||13.5||1.664||42.3||2 1/4||D 1/2|
|0.546||13.9||1.714||43.5||2 3/4||E 1/2|
|0.562||14.3||1.765||44.8||3 1/4||F 1/2||5||5.25|
|0.578||14.7||1.815||46.1||3 3/4||G 1/2||6||6.50|
|0.594||15.1||1.865||47.4||4 1/4||H 1/2||7.75|
|0.634||16.1||1.991||50.6||5 1/2||K 1/2||10|
|0.666||16.9||2.091||53.1||6 1/2||M 1/2||13||14.00|
|0.698||17.7||2.192||55.7||7 1/2||O 1/2||15||16.50|
|0.730||18.5||2.292||58.2||8 1/2||Q 1/2||17|
|0.762||19.4||2.393||60.8||9 1/2||S 1/2||19|
|0.794||20.2||2.493||63.3||10 1/2||U 1/2||22||22.75|
|0.826||21.0||2.594||65.9||11 1/2||W 1/2||24|
|0.866||22.0||2.719||69.1||12 3/4||Z 1/2|
For Larger size equivalents click here
We can measure rings with a great deal more accuracy than we can measure fingers. That is why we call it a ring size rather than a finger size.
Jeweler's finger gauge rings
Narrow rings are the most common, but if you are buying a wider ring it is best to try a wider set like the one's shown on the left, or anticipate that you will need a quarter or half size larger if the finger is sized using narrow sizing rings.
The dash marks following every
other number on the rings indicate half sizes
Finger sizes sometimes do not correspond to body size. Finger sizes also are prone to change with temperature, humidity, exercise, what you have been eating, time of day, time of the month, pregnancy and other factors. Dominant hand is usually 1/2 size larger, so if you are right handed and have a size 7 ring that fits the left hand it is reasonable to guess that a 7 1/2 will fit the right hand. Quarter sizes are offered to help you get the best fit, however quarter sizes make more difference on smaller fingers than on large fingers.
The best size is usually the ring that
fits snugly and gives a little resistance when you take it off. Wider rings
should be a little looser that narrow rings.
This ring is a 10 1/2 if sized by the true diameter
True diameter method
The center line method
If the ring is narrow, 3mm or less, the difference between the two methods is negligible. Wider rings gauged by these two methods will be called a slightly smaller size if the center line method is used. Because a ring size is a definition of diameter we think that it is proper that a ring actually measures the true diameter rather than contain a fudge factor for width. Your local jeweler may disagree, but calibration of gauges from different manufacturers may also disagree.
Every effort has been made to make the information on this page as accurate as possible. Walker Metalsmiths disclaims any responsibility for errors in this information except for transactions that are sales or purchases made by Walker Metalsmiths. Our free ring sizing policy is from 90 days of purchase with the restriction that gold or platinum rings may involve a price adjustment if an exchange is made that crosses a price bracket.
Copyright, Walker Metalsmiths, 2002 Updated 2013