Convert Circumference In Millimeters (mm, Inner Diameter And Circumference Of A Ring) to Older Brazilian Ring Size (Old Brazilian Ring Sizes)

Ring size conversion page helps to convert jewelry ring sizes used around the globe. As you could probably expect, people use different scales to mark ring sizes in various parts of the world. This is not a problem though, our converter lets you instantly convert a ring size from any scale to all the others.

Ring sizes can be measured by inner diameter of a ring or by the length of the inner circumference of a ring.

Unlike many other ring conversion tables you can find on the web, we use formulas to calculate exact conversions based on official standards instead of providing a loose approximate matching. We want to make sure you get the most reliable conversion result.

For most systems we round up sizes to a quarter of a size step. If this rounding-up adds difference of more than 1%, we show the actual difference as a percent of the ring diameter. It may sound cumbersome, but it's easy. Just try it – enter any ring size and get it converted to all other sizes.

Circumference in millimeters (mm)
Inner Diameter and Circumference of a Ring
Older Brazilian ring size
Old Brazilian Ring Sizes

This page features online conversion from Circumference in millimeters to Older Brazilian ring size. These units belong to different measurement systems. The first one is from Inner Diameter And Circumference Of A Ring. The second one is from Old Brazilian Ring Sizes.

If you need to convert other units, please start with the home page. You can also switch to the converter for Older Brazilian ring size to Circumference in millimeters.

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? Inner diameter or circumference should be more than zero ? Not a valid Wheat Sheaf ring size ? Not a valid ring size, sorry. ? Not a valid Northern American ring size

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