Ring size conversion chart
Our UK ring size conversion chart is designed to help you find your ring size at home. Just measure the ring size circumference of the finger you will be wearing the ring on, using a tape measure. Then use the ring size conversion chart to get your ring size and convert it.
| Ring Size | Circumference (mm) |
|---|---|
| A | 37.8mm |
| B | 39.1mm |
| C | 40.4mm |
| D | 41.7mm |
| E | 42.9mm |
| F | 44.2mm |
| G | 45.5mm |
| H | 46.8mm |
| I | 48.0mm |
| J | 48.7mm |
| K | 50.0mm |
| L | 51.2mm |
| M | 52.5mm |
| Ring Size | Circumference (mm) |
|---|---|
| N | 53.8mm |
| O | 55.1mm |
| P | 56.3mm |
| Q | 57.6mm |
| R | 58.9mm |
| S | 60.2mm |
| T | 61.4mm |
| U | 62.7mm |
| V | 64.0mm |
| W | 65.3mm |
| X | 66.6mm |
| Y | 67.8mm |
| Z | 68.5mm |
How to measure your finger for a ring
The most accurate way to measure your finger for a ring is to get professionally measured in-store. However, if this isn't possible, we offer a downloadable ring sizer that enables you to measure your ring size at home. Just follow these easy steps.
- 1. Follow the instructions to download and print our ring size guide on A4 paper.
- 2. Find the ring you want to measure and place it against the circles on the guide.
- 3. Match the dotted circle to the inside of the ring so that it fits perfectly.
- 4. You then have your ring size and can order your ring.
Order a free ring sizer
Don’t have a printer? No problem. We offer a free ring sizer tool that can be delivered straight to your door.
Order a free ring sizerHow to measure a ring in secret
Buying an engagement ring or a surprise gift for your partner? Here are our top tips on how to find
their ring size in secret.
Ask a friend or family member. Someone close to your partner may already know their ring size or could even try and subtly ask them on your behalf.
Measure an existing ring. If they already wear a ring on the finger in question, why not secretly measure it? You can either take the ring to a jeweller to be measured or print our ring size guide to measure it yourself.
Measure their finger while they are asleep. Although slightly trickier, you can measure your partner's finger using a piece of string whilst they are asleep. Just wrap it around the ring finger and tie a knot. Then using the string, measure it against our ring size guide.
Searching for the
perfect engagement ring?
Head to our engagement ring guide to learn everything you need to know about finding an impressive ring for the one you love.
Engagement Ring Buying Guide
Ready totie the knot?
Don’t have a printer? No problem.
We offer a free ring sizer tool that can be delivered straight to your door.
Ring measuring tips and tricks
Here are our top ticks and tricks to remember when measuring ring size.
Temperature
Hot temperatures expand the skin while cold temperatures shrink the skin. So it is a good idea to consider this before measuring.
Weight loss or gain
Any weight changes will impact how loose or tight the ring will fit.
Pregnancy
Just like weight, pregnancy can impact ring size. Bear in mind that fingers will be more swollen.
Comfort
Consider how easy it is to put on your finger and allow your finger to swell or shrink depending on the temperature.
Time
The best time of day to measure ring size is in the evening as the fingers are bigger in the evening when compared to the morning.
Ring resizing options
Don’t worry if you don’t get it right the first time, as we offer a 30-day free resizing
for up to two sizes up or down.
Average ring sizes
When buying an engagement ring, some people choose the average ring size
and get it resized later. Here is how the average ring size UK differs for both men and women.
Average UK ring sizes for women
The average ring size for women ranges from size K to N,
as shown on the women's ring size guide.
Average UK ring sizes for men
The average ring size for men ranges from size S to T, as shown on the men's ring size guide. The most popular ring size for men UK being size.
Need help finding your ring size?
Our friendly Customer Service Team is available to help should you need further guidance. Head into a Live Chat or call us on 020 7138 3672 to speak to one of our team members.
FAQ's
When resizing we recommend either going up or down two sizes to minimise the risk of damage. If you go any further than 2 sizes up or down, the risk of damaging the ring or affecting the diamond/gemstone massively increases.
There are many factors that affect the resizing of your ring and depending on the design, there may be instances where resizing may not be possible. If your ring is set on a full eternity band, it’s likely that it’s unable to be resized as there is no bare metal for the jeweller to work with. If your ring is set on a plain band, providing there is enough material to work with resizing is a fairly easy process. Here at Diamonds Factory, we also offer complimentary 30-day free resizing too.
If your ring is unable to be resized, there are plenty of other options to consider so don’t panic. The first option is of course to have it remade; however, this may not necessarily be in your budget and luckily there are much more affordable options to consider. One option is to purchase a new ring mount and have your diamond/gemstone added onto this instead, saving you money on buying a new precious stone. An even cheaper option is to add a small sizing bar or adjuster at the bottom of your ring.
Upon receiving your ring, we aim to get resizing done with 10-14 days. However, it’s important to note that depending on your ring design, this may take longer. Resizing cannot be done in store, and items need to be sent directly to our warehouse where our skilled craftsmen will resize your ring.
Rings can be resized up to 2-4 times. It’s important to note that every time you resize a ring you are weakening its structure slightly, which is why we recommend trying to get your resizing right on the first round.