find your ring size

Ring Size Guide

finger size guide

Do You Know Your Ring Size?

To find your perfect ring size, view our Ring Size Chart below. Comfort and fit are paramount for your new ring, which is why Suttons & Robertsons offer complimentary ring resizing services. Your ring can be resized up or down three sizes, free of charge, subject to suitability. The availability of this service will be indicated with product details where applicable. 

Free printable guide

How To Measure Your Ring Size

  1. Download and print off our ring sizer
  2. Cut out the ring sizer tool
  3. Place around your finger
  4. Once in a comfortable position, read where the arrow is pointing. You now have your ring size!

Frequently Asked Questions

Can I use a ring I already own to find my size?

Absolutely! Measure the inside diameter of a ring that fits the right finger and compare it to the size chart. Just make sure you measure the inside, not the outside. You can also bring in one of your current rings to our store where we can help measure it for you.

What if the ring I want doesn’t fit?

Don't worry. We offer complimentary ring resizing up or down for up to three sizes on suitable rings. That way, you can order the ring you love without worrying about finding the perfect size right away.

How do I figure out my ring size at home?

The easiest way is to use our printable ring sizer to find your UK ring size. You can use our ring size comparison chart to do a US to UK ring size conversion to find one of our rings in your perfect size.

Do different countries have different ring size systems?

Yes, there are a few sizing standards worldwide: US, UK, European, and more. Our size chart helps you convert between these, so you can find your size no matter where you are.

Does it matter what time of day I measure my finger?

Fingers can swell or shrink throughout the day, so it’s best to measure in the evening when your fingers are at their largest. Also avoid measuring your finger when it’s cold, because your fingers might be smaller than usual.

What if I’m between ring sizes?

If you’re stuck between two sizes, it’s usually best to go for the larger one. You want the ring to be comfortable, not tight.

Will my ring size change over time?

Factors like weight changes, pregnancy, or even temperature can affect finger size. If it’s been a while since you last measured, it might be worth checking again.

Do ring sizes differ between men and women?

Ring sizes work the same for everyone, but men’s rings tend to be larger on average. Just measure your finger to get the right size. It is all about a comfortable fit.

How accurate are online ring size guides?

When you follow the instructions carefully and measure properly, online guides can be very accurate. But if you want to be 100% sure, visit one of our London showrooms where our team can help you measure your size accurately.

experienced CONSULTANTS

Still Unsure Of Your Size?

Determining your ring size from home can be tricky, as any measurements you take will only serve as a rough guide. For the most accurate fit, we recommend visiting one of our stores where our expert team can assist you in finding your perfect size. Not only will they ensure a comfortable fit, but they’ll also help you discover a stunning ring, perfect for you.

Ring Size Comparison Chart

Ring Diameter (Inside) Ring Circumference (Inside) ‹ International Standard Sizes ›
MM Inches MM Inches Britain & Australia USA & Canada Europe
9.9 0.390 31.1 1.22 · 0000 ·
10.7 0.442 33.7 1.39 · 00 ·
11.5 0.454 36.2 1.43 · 0 ·
12.0 0.470 37.5 1.50 A 1/2 ·
12.2 0.479 38.3 1.51 A 1/2 3/4 ·
12.4 0.487 38.9 1.53 B 1 ·
12.6 0.506 39.6 1.56 B 1/2 1 1/4 ·
12.8 0.503 40.2 1.58 C 1 1/2 ·
13.0 0.511 40.8 1.61 C 1/2 1 3/4 ·
13.2 0.520 41.5 1.63 D 2 41 1/2
13.4 0.528 42.1 1.66 D 1/2 2 1/4 ·
13.6 0.536 42.8 1.68 E 2 1/2 42 3/4
13.8 0.544 43.5 1.71 E 1/2 2 3/4 ·
14.0 0.553 44.1 1.74 F 3 44
14.2 0.557 44.5 1.75 F 1/2 3 1/8 ·
14.3 0.561 44.8 1.76 F 3/4 3 1/4 ·
14.4 0.565 45.1 1.77 G 3 3/8 45 1/4
14.5 0.568 45.4 1.79 G 1/4 3 1/2 ·
14.6 0.573 45.7 1.80 G 1/2 3 5/8 ·
14.7 0.576 46.0 1.81 H 3 3/4 46 1/2
14.9 0.585 46.7 1.84 H 1/2 4 ·
15.0 0.592 47.3 1.86 I 4 1/4 47 3/4
15.3 0.601 48.0 1.89 I 1/2 4 1/2 ·
15.4 0.606 48.4 1.90 J 4 5/8 50
15.5 0.611 48.8 1.92 J 1/4 4 3/4 ·
15.7 0.618 50.3 1.94 J 1/2 5 ·
15.8 0.622 50.6 1.95 K 5 1/8 50
15.9 0.625 50.0 1.97 K 1/4 5 1/4 ·
16.0 0.630 50.3 1.98 K 1/2 5 3/8 ·
16.1 0.634 50.6 1.99 L 5 1/2 51 3/4
16.3 0.642 51.2 2.02 L 1/4 5 3/4 ·
16.4 0.646 51.6 2.03 L 1/2 5 7/8 ·
16.5 0.650 51.9 2.04 M 6 52 3/4
16.7 0.658 52.5 2.07 M 1/2 6 1/4 ·
16.9 0.666 53.2 2.09 N 6 1/2 54
17.1 0.674 53.8 2.12 N 1/2 6 3/4 ·
17.4 0.683 54.5 2.15 O 7 55 1/4
17.5 0.687 54.8 2.16 O 1/2 7 1/4 ·
17.8 0.698 55.8 2.20 P 7 1/2 56 1/2
18.0 0.707 56.5 2.22 P 1/2 7 3/4 ·
18.2 0.716 57.1 2.25 Q 8 57 3/4
18.4 0.722 57.7 2.27 Q 1/2 8 1/4 ·
18.5 0.729 58.2 2.29 Q 3/4 8 1/2 ·
18.6 0.733 58.5 2.30 R 8 5/8 59
18.7 0.736 58.7 2.31 R 1/4 8 3/4 ·
18.8 0.740 59.1 2.32 R 1/2 8 7/8 ·
18.9 0.743 59.3 2.35 R 3/4 9 ·
19.1 0.752 60.0 2.36 S 9 1/8 60 1/4
19.2 0.757 60.4 2.38 S 1/4 9 1/4 ·
19.3 0.760 60.7 2.39 S 1/2 9 3/8 ·
19.4 0.764 61.0 2.40 S 3/4 9 1/2 ·
19.5 0.768 61.3 2.41 T 9 5/8 61 1/2
19.6 0.772 61.6 2.43 T 1/4 9 3/4 ·
19.8 0.781 62.3 2.45 T 1/2 10 ·
20.0 0.780 62.9 2.48 U 10 1/4 62 3/4
20.2 0.795 63.5 2.50 U 1/2 10 1/2 ·
20.3 0.800 63.8 2.51 V 10 5/8 63
20.4 0.805 64.2 2.53 V 1/4 10 3/4 ·
20.7 0.814 65.0 2.56 V 1/2 11 ·
20.8 0.817 65.2 2.57 W 11 1/8 65
20.9 0.821 65.5 2.58 W 1/4 11 1/4 ·
20.9 0.824 65.8 2.59 W 1/2 11 3/8 ·
21.0 0.830 66.2 2.61 W 3/4 11 1/2 ·
21.2 0.834 66.5 2.62 X 11 5/8 66 1/4
21.2 0.836 66.7 2.63 X 1/4 11 3/4 ·
21.3 0.838 66.9 2.64 X 1/2 11 7/8 ·
21.5 0.846 67.5 2.66 Y 12 67 1/2
21.7 0.854 68.1 2.68 Y 1/2 12 1/4 ·
21.9 0.861 68.8 2.71 Z 12 1/2 68 3/4
22.1 0.870 69.4 2.73 Z +1/2 12 3/4 ·
22.3 0.879 70.2 2.76 Z+1 13 ·
22.6 0.890 71.0 2.80 Z+1.5 13.5 ·
22.7 0.893 71.3 2.81 Z+2 · ·
22.9 0.902 72.0 2.83 Z+2.5 · ·
23.0 0.908 72.5 2.85 Z+3 · ·
23.3 0.915 73.0 2.87 Z+3.5 · ·
23.5 0.924 73.7 2.90 Z+4 · ·
23.6 0.927 74.0 2.91 Z+4.5 · ·
23.9 0.940 75.0 2.95 Z+5 · ·
24.3 0.955 76.2 3.00 Z+6 · ·

If you have any questions, please contact us.

Our Services

Experts

All our watches and jewellery items are fully authenticated and sold with a 12 month warranty for your peace of mind.

Sell or Part Exchange

As private jewellery and watch buyers we offer the option for you to sell your own pieces to us. We can also accept pieces in part exchange for purchases.

Jewellery & Watch Sourcing

If you are looking to buy a specific watch model or piece of jewellery please get in touch with our expert team at S&R and we can try and source this for you.