Giving or buying a ring is not as simple a task as it may seem. Not only do you have to choose the material, design and finishing, you also have to be precise about the size.

Getting the correct size of your ring is as fundamental as every other characteristic that defines the custom jewel. Since it is one of the most personal pieces of jewelry, its size requirements are stringent.

There is nothing as frustrating as buying a ring that is too big or too small.

It is pertinent to note that ring scaling systems vary from country to country. So, to be sure you are getting your ring customization right, do not forget to look carefully at the established formats applicable to your country.

Canada and the US adapts a numerical scale that includes quarter and half sizes.  This means that for every .032 inch increase in diameter, the ring size increases by 1.

This variation pervades through the UK and Australia and any other country you can think of. But you need not worry about becoming a ring conversion expert to have a ring made for you. The official international ring conversion chart will provide  you with quick answers at a glance.

How to Measure Correct Size of a Ring at Home

Everyone knows their own size of clothes and shoes. But what about the size of their rings? If you like to wear jewelry on your finger, you should know your ring size as well.

Here's a practical guide to help you measure your ring size at home.

Use a Ring Sizer

This best way determine your ring size without a jeweler's guidance is using a ring sizer. This belt-like band allows you to easily calculate the right ring size. It functions like a belt.

To use the ring sizer, push the end of the belt through the opening to form a loop. Put this loop around your finger and tighten it until it fits comfortably.

Make sure that the loop can slide easily over the knuckle of your finger so that the ring can be put on and taken off without any hassle. The magnifying glass on the belt displays the exact size of your finger's circumference.

Use a String

You can also measure your ring size at home with the aid of a string, pen and measuring tape.

First, Wrap the string around your finger. It should be positioned where you want your ring to sit. In order to ensure that the ring can be easily removed from your finger, you should adjust the string so that it fits easily over your knuckle.

Mark the point on the string where it meets the end with a pencil. Once done, you’ll have to measure the string up to the mark with a millimeter ruler.

Use a Strip of Paper

In the absence of a ring sizer or string, paper can be used to measure your ring size. You'll also need, a ruler and scissors to use this method.

To do this, a paper strip (ideally 5 mm wide) is placed around the finger, which should be easy to slide over the joint. The point where the paper encloses the finger is then marked and then cut off at this point. Place the cut strip lengthways on a ruler, read off the number and the ring size is already determined, example: 5.8 cm (58 mm) corresponds to ring size 58. If you have measured exactly five centimeters with the paper strip, you have ring size 50.

The procedure works just as well with a string, but this is often very narrow and can therefore falsify the result. The root of the finger on which the ring sits is usually thinner than the joint.

Use a Ring That Already Fits

Trying to get a perfect ring isn’t really as easy as it seems, especially if you intend to keep it a surprise. You’ll have to be as discrete as possible.

You need not go through any much trouble to measure your ring size or your partner's if there's an existing ring that fits the way you like it. Using a pen or pencil, trace the inner outline of the ring onto a piece of paper.

Tips to Get the Accurate Ring Size

During the day, at higher temperatures or during pregnancy, fingers often swell and increase in size. Therefore, the ring size should preferably be determined in the evening and/or on warmer days.

The left fingers are quite thicker than right fingers and ring size changes with age, so a regular check prevents bad purchases.

The easiest way to determine your ring size is to use a ring that already fits as a base. The following formula applies: place the ring on a ruler, and multiply the value of the diameter by 3.14. The result is the ring circumference, i.e. the ring size. 

For example, if the ring has an inside diameter of 16 mm, 16 is multiplied by 3.14. This results in an inner circumference of 50.24 mm, which rounds up to a ring size 50.


We hope we have helped you determine the correct size of a ring. Knowing how to do this is crucial to buying and giving the right jewelry. You won't have issues purchasing the ideal ring even without the presence of the other party.

Written by Ben Turton

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