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Learn How to Find Your Ring Size

Posted on May 08 2019

Sterling Silver Signet Ring | Rebecca Cordingley Jewellery Online

Before you purchase a ring online, you need to find your ring size. 

Did you know there are several sizing systems in use around the world? Australia, the United Kingdom, Ireland, New Zealand and South Africa use a system based on the alphabet (sizes A - Z+6) while the United States, Canada and Mexico use a numerical system (sizes 1-16). Europe and Asia also have their own systems. 

We take orders for rings in our online jewellery store in both the Australian/British letter system and the North American number system.

There are a couple of important things to bear in mind while measuring your ring size - wider rings usually require a larger size and our hands are not the same size.

Wide Band Rings 

 If the ring you're purchasing is wider than 4mm for women or 6mm for men, you'll need a larger size. Usually 1/2 size larger in the US system and a full size larger in the Aus/UK system. Our product pages will mention if a wide band size is required.

Your Dominant Hand Will Be Larger

While it might appear that your hands are the same size, it's rarely the case. Your dominant hand is probably slightly larger than your non-dominant hand, ie if you're right-handed, your right ring finger will be slightly larger than your left right finger and vice versa. It's best to decide which finger you're going to wear a ring on before measuring.

How To Determine Your Ring Size

Sizing rings can be tricky and there are a few ways to do it. We'll start with the most accurate and then describe some that can be done at home but might be less accurate.

Ring sizer tool | Rebecca Cordingley Jewellery Online

Have your ring size measured professionally

If you live or work near a jewellery store, you can ask them to measure your ring size. This is the best and most accurate way to have your ring size measured - they should do it free of charge and you'll know the size is correct. Don't forget that if you're purchasing a wide band ring, you'll need to ask them to measure your wide band size. 


Digital caliper | Rebecca Cordingley Jewellery Online

Use an existing ring

You'll need a pair of vernier, dial or digital callipers and a ring that you know fits your finger for this method.

Zero the callipers and measure the internal diameter of your ring, making sure you measure at the widest spot. Note this measurement and use our international ring size conversion chart to determine your size. Use either the first or second column (inches or mm) and find the size closest to your size, then scroll across and find your corresponding Australian/British or North American ring size.

If you fall in between two sizes, unless very close to the smaller size, we recommend going up a size rather than down.


Ring size gauge | Rebecca Cordingley Australian Jewellery Online

Purchase one of our ring size gauges

We have plastic, reusable ring size gauges in our online store. These sizers come with their own instructions and are easy to use. They are not as accurate as professional sizers but if you are unable to visit a jewellery store, they are a good option. 

They cost AU$6, including postage within Australia.


Measure your finger with a piece of paper

Please be aware that this is the least accurate method and comes with a high chance that the size will be wrong. Wrap a narrow piece of paper (4 or 5mm wide) around your finger. It shouldn't be too tight but not so loose that it would fall off if it were a real ring. Mark the spot where the two ends meet and measure the length of the piece of paper in millimetres. 

Use our international ring size conversion chart to determine your size.