This article provides a comprehensive guide to determining your ring size, including a sizing chart for US, EU, and UK standards, along with measurement tips using simple household items like string, paper, and a ruler. It also offers advice on choosing the correct size based on average ring sizes for men and women and factors that can affect finger size.
To make things easier, we’ve provided a sizing table below that includes US, EU, and British Standard sizes, along with the corresponding diameter and circumference measurements in millimeters. Refer to the information below the table to know how to find out the right size for you.
Ring Size (US & Canada) | Ring Size (EU) | Diameter – International (mm) | Circumference – International (mm) | British Standard |
---|---|---|---|---|
3 | 44 | 14.1 | 44.2 | F ½ |
3 ¼ | 45 | 14.3 | 44.8 | G |
3 ½ | 45 ½ | 14.5 | 45.5 | G ½ |
3 ¾ | 46 | 14.7 | 46.1 | H |
4 | 47 | 14.9 | 46.8 | H ½ |
4 ¼ | 47 ½ | 15.1 | 47.4 | I |
4 ½ | 48 | 15.3 | 48.0 | I ½ |
4 ¾ | 48 ½ | 15.5 | 48.7 | J |
5 | 49 | 15.7 | 49.3 | J ½ |
5 ¼ | 50 | 15.9 | 50.0 | K |
5 ½ | 50 ½ | 16.1 | 50.6 | K ½ |
5 ¾ | 51 | 16.3 | 51.2 | L |
6 | 52 | 16.5 | 51.9 | L ½ |
6 ¼ | 52 ½ | 16.7 | 52.5 | M |
6 ½ | 53 | 16.9 | 53.1 | M ½ |
6 ¾ | 53 ½ | 17.1 | 53.8 | N |
7 | 54 | 17.3 | 54.4 | N ½ |
7 ¼ | 55 | 17.5 | 55.1 | O |
7 ½ | 55 ½ | 17.7 | 55.7 | O ½ |
7 ¾ | 56 | 17.9 | 56.3 | P |
8 | 57 | 18.1 | 57.0 | P ½ |
8 ¼ | 57 ½ | 18.3 | 57.6 | Q |
8 ½ | 58 | 18.5 | 58.3 | Q ½ |
8 ¾ | 59 | 18.8 | 58.9 | R |
9 | 59 ½ | 19.0 | 59.5 | R ½ |
9 ¼ | 60 | 19.2 | 60.2 | S |
9 ½ | 61 | 19.4 | 60.8 | S ½ |
9 ¾ | 61 ½ | 19.6 | 61.4 | T |
10 | 62 | 19.8 | 62.1 | T ½ |
10 ¼ | 62 ½ | 20.0 | 62.7 | U |
10 ½ | 63 | 20.2 | 63.4 | U ½ |
10 ¾ | 64 | 20.4 | 64.0 | V |
11 | 64 ½ | 20.6 | 64.6 | V ½ |
11 ¼ | 65 | 20.8 | 65.3 | W |
11 ½ | 66 | 21.0 | 65.9 | W ½ |
11 ¾ | 66 ½ | 21.2 | 66.6 | X |
12 | 67 | 21.4 | 67.2 | X ½ |
12 ¼ | 67 ½ | 21.6 | 67.8 | Y |
12 ½ | 68 | 21.8 | 68.5 | Y ½ |
12 ¾ | 69 | 22.0 | 69.1 | Z |
13 | 70 | 22.2 | 69.7 | Z ½ |
13 ¼ | 71 | 22.4 | 70.4 | Z + 1 |
13 ½ | 71 ½ | 22.6 | 71 | Z + 1 ½ |
Average Ring Sizes for Women and Men
Understanding average ring sizes can help you choose the perfect fit. For women, the typical ring size ranges from 3 to 9, with the most common sizes being between 5 and 7. Among these, size 6 is the most frequently chosen. For men, ring sizes generally span from 6 to 13, with popular choices falling between sizes 8 and 10-½. The most common size for men is 9.
These general guidelines can serve as a starting point. If you don’t see your size listed, our experts are available to assist with special orders. There are also several easy methods you can use at home to determine your exact ring size.
How to Measure Ring Size Using String, Paper, and a Ruler
If you’re trying to find the perfect ring size at home, there are simple and creative methods you can use. If you’re shopping for someone else, the best approach is to ask them directly. However, if you’re planning a surprise, consider enlisting help from friends or family who can inquire subtly. You can also use our printable ring size guide to measure an existing ring.
For a more hands-on approach, these steps will help you measure ring size accurately using just a few basic items: string, paper, a ruler, and a pen. Some quick calculations might also be needed to determine the numeric size.
Steps to Measure Your Ring Size:
- Wrap a piece of string or paper around the base of your finger.
- Mark where the ends overlap with a pen.
- Measure the length of the string or paper in millimeters, then divide this number by 3.14 (Pi) to determine the diameter of the ring.
- Compare your measurement to our ring size chart to find the closest match.
Additional Ring Sizing Tips
- Use a tape to measure the inside of another ring that fits well.
- The ring should sit comfortably on your finger—snug enough that it won’t fall off, but loose enough to slide over your knuckle without much resistance.
- If your knuckle is larger than the base of your finger, measure both areas and choose a size in between.
- Measure your ring size at the end of the day when your fingers are warm. Finger size can fluctuate throughout the day and with changes in weather; your fingers tend to be smaller in the morning and in colder conditions. Also, remember that fingers on your dominant hand may be slightly larger.
- To ensure accuracy, repeat the measurement process 3 to 4 times.