Inside diameter (mm)	Inside circumference (mm)	US / Canada	EU size (approx.)
14.1	44.2	3	44
14.5	45.5	3.5	46
14.9	46.8	4	47
15.3	48.0	4.5	48
15.7	49.3	5	49
16.1	50.6	5.5	51
16.5	51.9	6	52
16.9	53.1	6.5	53
17.3	54.4	7	54
17.7	55.7	7.5	56
18.1	57.0	8	57
18.5	58.3	8.5	58
18.9	59.5	9	60
19.4	60.8	9.5	61
19.8	62.1	10	62
20.2	63.4	10.5	63
20.6	64.6	11	65
21.0	65.9	11.5	66
21.4	67.2	12	67
21.8	68.5	12.5	69
22.2	69.7	13	70

All you need to know about ring sizes

 

 

Buying rings online even if you know your size can be very stressful. All the different charts and measurements sometimes make it difficult to choose the right size. After all when a ring of your dream arrives you do want it to fit perfectly and and I am here to make it easier!
That is ALL you need to know about how to choose a right ring size!

 

I work with European ring sizes that show the inside diameter in mm of the ring. If you already know your size and just need to convert it, scroll to the very bottom of this page to find an international ring conversion chart.

 

Let’s start!

 

There are different measurement systems which are used in different countries.

In the United States and Canada, ring sizes range from 3 to 13, which includes half and quarter sizes. The sizes are measured in inches or millimeters based on the ring’s diameter or circumference. The diameter measures the inside length of the ring, whereas circumference measures the length of the entire band. International ring sizing involves the same measurement process, but the numbered sizes run on different scales, which vary by country. Australia and the United Kingdom actually use an alphabetical letter sizing system.

The same goes with every brand or jeweller- different companies or jewellers use slightly different ring size charts. That means that the only way to get the correct ring size is to know it’s inside circumference or diameter and find it on a ring chart provided by the company you are about to order from. 

 

Finger shape 

 

Yes, there are different kinds of fingers, and they can impact ring size and fit. If you have a tapered ring finger, it widens downward toward the base, which is where your ring will fit the tightest. Rings can easily fall off tapered fingers if they slide up, so it’s incredibly important to have a snug fit. On the other hand are knotted fingers where the knuckle in the middle of the finger is the widest part, which the ring has to fit over. However, the ring might move around and fit too loosely at the base of your finger. In this case, consider getting sizing beads added to your sparkler. These small add-ons stay on the bottom of the inner ring close to your hand and act like pressure points to keep the ring in place. They’re incredibly easy to put on and remove.

 

Band width or layering

 

Rings with thinner bands tend to run a bit larger, whereas thicker rings have a more snug fit. That means that a thin size M ring will not fit the same as a thick size M ring. The thicker the ring, the tighter the fit, so if you choose a ring with a deep band width or you know that you will be layering few thinner rings, you will likely need to go one size up.

Recomendations:

One UK size up for 6-10mm band 

Two UK sizes up For 10mm and thicker band

 

When to Measure Ring Size

 

There are different biological elements that can affect your finger such as temperature, diet, pregnancy, and others. Don’t be afraid if your finger changes size- it is incredibly normal! 

When should you do it?

Warm weather makes our fingers swell, and they tend to shrink from cold weather in the winter. Avoid eating salty foods, drinking hot cocktails, or performing any intense physical activity before measuring because these can all make your fingers swell. You want your body temperature to be normal and natural. Your fingers can also be swollen when you first wake up, so it’s best to get measured around the middle of the day at room temperature for the most accurate, comfortable fit. In the summer, it is recommended to take a few minutes to cool down before getting measured, especially if you’ve been outside in the heat for long periods of time.

 

How to measure your ring size

 

If you want to take matters into your own hands, you can use a few different at-home measurement methods with a printable size guide. Remember that the printable ring sizer is not a professional measurement and aren’t always completely accurate so they should be only used as a guide or an estimate.

One more option to do it at home for most accurate results is to get a plastic ring sizer. It works great if you want to measure all fingers. You can get your plastic ring sizer here

You can always turn to a professional jeweller for an accurate ring measurement. Always ask for a ring inside circumference or diameter. 

 

Midi rings

 

What about midi rings?

A general rule of thumb is that a midi ring will be 6-7 UK sizes smaller than your normal size. For example, if you are a size M on your ring finger, you should take a size F in midi ring.

 

   Ring size - Midi size

   EU 15.8 - 13.2   (UK K-D)

   EU 16.1 - 13.6   (UK L-E)

   EU 16.5 - 14.1   (UK M-F)

   EU 16.9 - 14.4   (UK N-G)

   EU 17.1 - 14.7  (UK O-H)

   EU 17.8 - 15.0   (UK P-I)

   EU 18.2 - 15.4   (UK Q-J)

   EU 18.6 - 15.8   (UK R-K)

   EU 19.1 - 16.1  (UK S-L)

   EU 19.5 - 16.5   (UK T-M)

   EU 20.0 - 16.9   (UK U-N)

 

If you have any further questions about sizing- get in touch!

 

International Ring Conversion Chart