Are you planning to buy an engagement ring or wedding ring for a loved one, but are unsure of their ring size? Our free ring sizer guide is the perfect solution! All you have to do is simply click below to download, and follow the instructions. Of course, our team at Oscar & Olivia Jewellery will be happy to assist you in any way that we can, so please feel free to get in touch with any queries that you may have.
Download the PDF file above, print to scale on A4 paper, and using a pair of scissors cut around the dotted lines to reveal your finger sizer.
You can check the document is printed to scale by measuring the 5cm line once printed.
Make a slit in the sizer where shown, and wrap the band sizer around your finger, with the end of the band poking through the slit you’ve made.
The sizer should fit comfortably around your finger, take care to ensure that it is not too tight. Make sure you can remove the sizer over your knuckle.
The letter indicated by the “Ring Size” in the slit indicates the ring size you will need. This guide is for indication purposes only, and should you have any questions, please get in touch with us directly and we will be happy to assist you.
Below is our international ring size conversion chart. This will be extremely useful if you would like to compare ring sizes from UK to USA and Europe:
Find your ring size with our International Conversion Chart
| Ring Diameter (Inside) | Ring Circumference (Inside) | ‹ International Standard Sizes › | ||||
| MM | Inches | MM | Inches | Britan & 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 | · | · |
Rings at Oscar & Olivia
Here at Oscar & Olivia Jewellery, we offer a beautiful selection of rings, shaped bands, and classic wedding rings. Shop today or feel free to get in touch with us; a member of our team will be more than happy to guide you through your ring options!
