Ring Size Guide

We’ve been a part of your most special moments for over 100 years, so we know buying an engagement ring or a wedding ring is one of the most momentous purchases of your life.

Discover how to measure your ring size or your loved one’s 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

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.

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…


Ring sizing FAQs

  • How do you figure out your ring size?

    To measure your own ring size, simply print off our ring size guide above and use our sizer tool or simply pop into your local Beaverbrooks store where we’ll be happy to measure your finger.

  • Are ring sizes different for men and women?

    No, ring sizes are exactly the same for men and women. There are different average ring sizes for men and women, but a size M in a ladies ring would be the exact same size in a men’s size M ring for example.

  • 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. 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.

  • What if I buy the wrong ring size?

    Don’t panic if you’ve already bought a ring and haven’t got the right ring size. If the ring you’ve purchased has plain shoulders, then we will be able to resize the ring to yours or your partner’s ring size. If there are diamonds on the shoulders, this style can’t be resized, but as long as the ring is unworn then we can exchange it for the right size.

  • 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.

  • How do I know if my ring is the right fit?

    You want your ring to be comfortable and secure. It should slip comfortably onto your finger with a slight resistance as it goes over your knuckle. It’s important that you can get it off if needed for swimming or for working reasons for example, but it’s important it doesn’t twist around and fall off on its own.

Still unsure? Ask one of
our friendly experts

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. Call us free on 0800 169 2329. Our phone lines are open Monday to Friday 9am - 8pm or Saturday and Sunday 10am – 5pm.

You can also use our live chat service where we’ll be happy to help with all your questions.

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.


Ready to shop rings or need some proposal tips?

Whether you’re looking for an engagement ring, wedding ring or a designer piece, explore our ring collection and find the one you love. Need some ideas on how to propose? Our helpful guide has you covered.