Ring Size Guide

Buying an engagement ring or a wedding ring will be one of the most momentous purchases of your life, so it’s important to make sure you find the perfect fit. Discover how to measure ring size at home with our expert guide, featuring ring size conversion charts and helpful tips.

Popping into one of our stores and having your finger measured is the most accurate way to determine your ring size, but if you need to find out from the comfort of your own home, we’re here to help with these handy tips.

Ring Size Conversion Charts

  • UK Ring Sizes

    UK Ring Sizes

    Ring Size Circumference (mm) Ring Size Circumference (mm) Ring Size Circumference (mm)
    A 37.8 J 48.7 S 60.2
    B 39.1 K 50.0 T 61.4
    C 40.4 L 51.2 U 62.7
    D 41.7 M 52.5 V 64.0
    E 42.9 N 53.8 W 65.3
    F 44.2 O 55.1 X 66.6
    G 45.5 P 56.3 Y 67.8
    H 46.8 Q 57.6 Z 68.5
    I 48.0 R 58.9
    Ring Size Circumference (mm) Ring Size Circumference (mm)
    A 37.8 N 53.8
    B 39.1 O 55.1
    C 40.4 P 56.3
    D 41.7 Q 57.6
    E 42.9 R 58.9
    F 44.2 S 60.2
    G 45.5 T 61.4
    H 46.8 U 62.7
    I 48.0 V 64.0
    J 48.7 W 65.3
    K 50.0 X 66.6
    L 51.2 Y 67.8
    M 52.5 Z 68.5

    Using a tape measure, find out your ring size (in mm) by measuring the circumference around the third finger on your left hand. Then, use the above UK ring size chart to find the corresponding letter.

  • UK to US Ring Size Conversion

    UK to US Ring Size Conversion

    UK US & Canada UK US & Canada UK US & Canada
    A 1/2 K 5 1/4 S 1/2 9 1/4
    B 1 K 1/2 5 1/2 - 9 1/2
    C 1 1/2 L 5 3/4 T 9 3/4
    D 2 L 1/2 6 T 1/2 10
    D 1/2 2 1/4 M 6 1/4 U 10 1/4
    E 2 1/2 M 1/2 6 1/2 U 1/2 10 1/2
    E 1/2 2 3/4 N 6 3/4 V 10 3/4
    F 3 O 7 V 1/2 11
    F 1/2 3 1/4 O 1/2 7 1/4 W 11 1/4
    G 3 1/2 P 7 1/2 W 1/2 11 1/2
    G 1/2 3 3/4 P 1/2 7 3/4 X 11 3/4
    H 4 Q 8 Y 12
    H 1/2 4 1/4 Q 1/2 8 1/4 Y 1/2 12 1/4
    I 4 1/2 R 8 1/2 Z 12 1/2
    J 4 3/4 R 1/2 8 3/4 Z 1/2 12 3/4
    J 1/2 5 S 9 - 13

    Measure your UK ring size in mm before using our UK to US ring size chart to find your perfect fit in US (and Canadian) measurements.

  • UK to EU Ring Size Conversion

    UK to EU Ring Size Conversion

    A K 49 5/8 S 1/2 60 1/4
    B K 1/2 50 1/4 T 60 7/8
    C 40 1/2 L 50 7/8 T 1/2 61 1/2
    D 41 1/2 L 1/2 51 1/2 U 62 1/8
    D 1/2 42 1/8 M 52 1/8 U 1/2 62 3/4
    E 42 3/4 M 1/2 52 3/4 V 63 3/8
    E 1/2 43 3/8 N 53 3/8 V 1/2 63 3/8
    F 44 O 54 5/8 W 64 5/8
    F 1/2 44 5/8 O 1/2 55 1/2 W 1/2 65 1/4
    G 45 1/4 P 55 7/8 X 65 7/8
    G 1/2 45 7/8 P 1/2 56 3/4 Y 67 1/8
    H 46 1/2 Q 57 1/8 Y 1/2
    H 1/2 Q 1/2 58 Z 67 3/4
    I 47 1/8 R 58 3/8 Z 1/2 68 3/8
    J 48 3/8 R 1/2 59
    J 1/2 49 S 59 5/8

    Use our EU to UK ring size chart to find an accurate ring measurement for yourself or your loved one.

Printable Ring Size Chart

How to Measure UK Ring Size at Home

We’ve created a printable ring sizer chart (actual size) to make finding your perfect ring size easy – just follow these simple steps!

  1. Download and print off our ring sizer on A4 paper
  2. Cut around the sizer tool
  3. Place the tool around your finger
  4. Pull the end through the slot
  5. Pull it to fit snugly around your finger
  6. Make sure it slides over your knuckle
  7. Find the letter the arrow is pointing to and reveal your ring size
  8. Remember that thicker band widths need a larger size

Please note that this is only a guide and will not take into account the style of ring.

Download The ring size guide

How To Find Out Someone's Ring Size

How To Measure UK Ring Size In Secret

Want to know how to measure ring size in top secret style? These helpful tips will be your go-to guide. Here’s how to find their ring size and make it the most unforgettable surprise of their life…

Try On For Size

Take one of their rings and slide it onto your ring finger. Make a little mark with a pen where the ring goes up to on your finger and show this to one of our friendly experts in-store.

Get Creative

Why not get creative and buy some Play-Doh. Gently press one of your loved one’s rings into it and take into a Beaverbrooks store to have one of our experts check the size. Remember to clean the ring afterwards, and be careful not to get the playdough in the setting or the diamond.


Tying The Knot

Wait until they’re fast asleep and tie a piece of string around their finger and make a little knot. Just try your best not to wake them and you’re all set.

Tell A Fib

Just this once, tell a little white lie and pretend you’re treating a family member to a ring they like. Take your loved one with you, then ask them to try it on in their size to ‘see how it looks’. Just don’t forget to listen out for their size.

Something Borrowed

If you know your loved one won’t miss a ring they wear often for one day, simply take it into a Beaverbrooks store to be sized and sneakily put it back before they have time to notice.

Need Some Proposal Help?

Our Proposal Guide will help you pick the perfect engagement ring and give you some creative proposal ideas.


Ready To Shop Rings?

Whether you’re looking for an engagement ring or a designer piece, explore our ring collection and find the one you love.


Helpful Tips

Helpful Ring Sizing Tips

When you’re measuring ring size, don’t forget these useful tips.

Avoid measuring for a ring when you’re cold, as your fingers will be half a size smaller.

The evening is the best time of day to measure your finger, as this is when they are at their largest.

Measure your finger at least 3 times to ensure the correct size reading.

Rings with wider bands will fit a bit tighter, so you may need to go up a size.

The Perfect Fit

How Should a Ring Fit?

If you’re not used to wearing rings, you might be wondering how should an engagement ring fit? Well, it’s up to the individual on how they like their ring to feel but here are our suggestions.

How tight should a ring be?

Your ring should slide over your knuckle nicely and fit quite snug at the bottom without feeling too tight. When it comes to taking it off, you should feel a slight resistance or have to apply more pressure to move it back over your knuckle. It’s also key to remember our helpful ring sizing tips, you don’t want the ring to feel too loose or too tight in different temperatures.

Can you make a ring bigger?

This depends on the style of the ring. The best thing to do is bring your new ring into your nearest Beaverbrooks store and one of our experts will give you the help and advice you need.

Find your nearest store

What’s the average ring sizes for men and women?

For ring sizes in the UK, the average ring size for women is an O and the average ring size for men is a T.5. It’s good to keep in mind that everyone’s different and one size doesn’t fit all, so make sure to use our handy chart or visit your nearest Beaverbrooks for an accurate size.

Still Unsure?

If you need any more help or assistance, please call into any of our Beaverbrooks stores or contact our Customer Services team who will be happy to advise you. We are also happy to offer a free 30-day returns policy for refunds and exchanges, in case you need to change your ring for another size or style providing that the ring is unworn.

Store Finder

Visit One Of Our Stores

Find Out More
Customer Services

Contact Our Customer Service Team

Find Out More
Returns Policy

Read Our Returns Policy

Find Out More