Women stands against peach coloured tiles with a soft smile, with her hand to her face showing her bright and sparkly engagement ring which fits perfectly. The tone is dark, with dappled light that looks romantic
Ring Guides

How to Measure Your Engagement Ring Size at Home

Wondering how to measure ring size accurately? Knowing how to find your ring size is essential for a comfortable and secure fit. Luckily, you can easily measure ring size at home using simple tools like string, paper or a printable ring size chart. This guide will show you how to know your ring size in a few easy steps.

Choosing the perfect engagement ring is about more than just style – getting the right ring size is crucial for a secure and comfortable fit. Our Engagement Ring Buying Guide provides all the essential information you need, from diamond selection to finding the perfect fit. Whether you’re buying for yourself or planning a surprise proposal, knowing the correct ring size ensures your special moment goes off without a hitch.

For those looking to keep their proposal plans a secret, our guide to finding your partner’s ring size in secret provides expert advice and clever tricks to help you measure accurately without giving the game away. Together with this essential guide, you’ll have all the information needed to ensure the perfect fit, making your proposal truly unforgettable. Keep reading to discover how to get it right with ease!

Common ring size in the UK

In the UK, ring sizes are measured using an alphabetical system from A to Z. The average engagement ring and wedding ring size for women is L, which corresponds to a diameter of approximately 16.4mm. For men, the average size is T, with a diameter of about 19.6mm. However, ring sizes can vary significantly, even among people with similar height and weight, due to differences in finger shape and knuckle size. Measuring accurately in millimetres is essential to ensure the perfect fit.

Ring Size (UK) Ring Size (US) Ring Size (EU) Inside Diameter (MM)
E 2 1/2 42 3/4 13.7
E 1/2 2 3/4 42 3/4 13.9
F 2 7/8 44 14.1
F 1/2 3 44 5/8 14.3
G 3 1/4 45 1/4 14.5
G 1/2 3 1/2 45 7/8 14.7
H 3 3/4 46 1/2 14.9
H 1/2 4 47 1/8 15.1
I 4 1/4 47 3/4 15.2
I 1/2 4 1/2 48 15.4
J 4 3/4 48 3/4 15.6
J 1/2 5 49 15.8
K 5 1/4 49 5/8 16
K 1/2 5 1/2 50 1/4 16.1
L 5 3/4 50 7/8 16.4
L 1/2 6 51 1/2 16.6
M 6 1/4 52 1/8 16.8
M 1/2 6 1/2 52 3/4 17
N 6 3/4 53 3/8 17.2
N 1/2 7 53 1/4 17.4
O 7 1/4 54 17.6
O 1/2 7 1/2 54 5/8 17.8
P 7 3/4 55 1/4 18
P 1/2 8 55 7/8 18.2
Q 8 1/4 56 1/2 18.4
Q 1/2 8 1/2 57 1/8 18.6
R 8 3/4 57 3/4 18.8
R 1/2 9 58 3/8 19
S 9 1/4 59 19.2
S 1/2 9 1/2 59 5/8 19.4
T 9 3/4 60 7/8 19.5
T 1/2 10 61 1/2 19.7
U 10 1/4 61 1/8 19.9

When is it best to measure your ring size?

The best time to measure your ring size is in the evening, as this is when your fingers are at their largest due to natural swelling that occurs throughout the day. Avoid measuring your ring size in the morning or after exposure to cold temperatures, as your fingers may be smaller. Ensuring the measurement is taken at the right time of day helps achieve a more accurate fit, ensuring your ring is comfortable to wear at all times.

3 ways to measure your ring size

Finding the perfect fit for your ring is easy with these three simple methods. Follow these steps to determine your ring size accurately.

Measure with a String

Using a string is a quick and straightforward way to measure your ring size at home. Here’s how:

  1. Take a piece of non-stretch string, paper or floss.

  2. Wrap it snugly around the base of the finger you wish to measure.

  3. Mark where the string overlaps with a pen or marker.

  4. Lay the string flat and measure its length in millimetres.

  5. Compare the measurement to a UK ring size chart (see below).

Ring Size (UK) Inside Diameter / Circumference (MM) Ring Size (UK) Inside Diameter / Circumference (MM)
E 13.7 / 43 M 1/2 17 / 53.4
E 1/2 13.9 / 43.6 N 17.2 / 54
F 14.1 / 44.3 N 1/2 17.4 / 54.6
F 1/2 14.3 / 44.9 O 17.6 / 55.3
G 14.5 . 45.5 O 1/2 17.8 / 55.9
G 1/2 14.7 / 46.2 P 18 / 56.5
H 14.9 / 46.8 P 1/2 18.2 / 57.1
H 1/2 15.1 / 47.4 Q 18.4 / 57.8
I 15.2 / 47.8 Q 1/2 18.6 / 58.4
I 1/2 15.4 / 48.3 R 18.8 / 59
J 15.6 / 49 R 1/2 19 / 59.6
J 1/2 15.8 / 49.6 S 19.2 / 60.3
K 16 / 50.3 S 1/2 19.4 / 60.9
K 1/2 16.1 / 50.5 T 19.5 / 61.2
L 16.4 / 51.5 T 1/2 19.7 / 61.9
L 1/2 16.6 / 52.1 U 19.9 / 62.5
M 16.8 / 52.8 U 1/2 20.2 / 63.4

Measure with a Ring Sizer

A ring sizer is the most accurate way to measure your size. These are often free or inexpensive tools available online or at jewellery stores. Simply slip the adjustable ring sizer onto your finger and tighten it until it fits snugly, then note the size indicated on the tool.

Measure with a Ring Size Chart

Using a ring size chart is another easy and precise method to determine your ring size. At Queensmith, we provide a Printable Ring Size Guide to help you measure accurately at home. Here’s how to use it:

  1. First, ensure the PDF is printed at 100% scale on A4 paper. Use a ruler to verify the scale on the printout.

  2. Select a well-fitting ring that is worn on the finger you wish to size.

  3. Place your ring over the printed circles on the chart. The inner edge of the ring should align perfectly with the outer edge of the circle.

  4. If your ring falls between two sizes, choose the larger one for comfort.

This straightforward method ensures precision and makes it easy to find the perfect fit for your engagement ring.

Ring sizing tips

Measuring your ring size accurately requires a few considerations:

  • Use non-stretchable material – If using a string or floss, avoid pulling it too tightly, as this may distort the measurement.

  • Consider your knuckle – If you have larger knuckles, ensure the ring can slide over comfortably without being too loose on the base of your finger.

  • Measure multiple times – Take measurements 3-4 times throughout the day to account for finger size changes due to temperature or activity.

  • Measure at the right time – Measure in the evening when fingers are at their largest for the most accurate fit.

Ring size is directly correlated to our height and clothing size, so if you know these details about your partner, we’ll be able to make a very good estimation!

Sarah-Jane | Gemmologist & Design Consultant
Queensmith consultant and gemmologist, Sarah Jane, laughing and smiling at the Queensmith showroom in Hatton Garden

How should my ring fit?

A well-fitting ring should sit snugly at the base of your finger without feeling too tight or too loose. It should slide over your knuckle with minimal resistance but not feel like it’s squeezing your finger. Once on, the ring should not spin excessively or risk falling off when your hand moves. At the same time, it shouldn’t leave indentations or feel uncomfortable during wear. Achieving the right balance ensures both comfort and security, making your ring a joy to wear every day.

What if I am not sure about my ring size?

If you’re unsure about your ring size, the most accurate solution is to visit a professional jeweller like Queensmith. Our experts provide precise measurements and personalised advice to ensure a perfect fit. Book an appointment to experience our excellent customer service and explore our wide range of engagement rings. From classic solitaires to modern halo designs, we offer options to suit every preference and occasion, helping you find the ideal ring for your love story.

What if I bought the wrong ring size?

If you’ve bought the wrong ring size, don’t worry – we offer free professional ring resizing for nearly all Queensmith purchases to ensure your ring fits perfectly. Our commitment to customer happiness includes ethical sourcing, sustainable lab diamonds through our very own Grown by Queensmith collection, comprehensive aftercare and free delivery. With our dedication to quality and service, your jewellery will be as flawless as the special moments it represents.

A goldsmith cuts into the band of a ring with a saw to prepare resizing the ring

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