The average ring size for women is US 6 to 7 (UK L½ to N½, 16.5 to 17.3 mm) and for men US 9 to 10 (UK R½ to T½, 19.0 to 19.8 mm). These are the sizes jewellers sell most often for the ring finger. They are a good starting point for a surprise gift, but every hand is different, so measure if you can: the online ring sizer reads the size of a ring you own in about 30 seconds.
Average ring size in every system
| US / Canada | UK / Australia | EU / ISO | India / Japan | Inner diameter | |
|---|---|---|---|---|---|
| Women – average | 6 – 7 | L½ – N½ | 52 – 54 | 12 – 14 | 16.5 – 17.3 mm |
| Women – usual range | 5 – 8 | J½ – P½ | 49 – 57 | 9 – 16 | 15.7 – 18.1 mm |
| Men – average | 9 – 10 | R½ – T½ | 60 – 62 | 19 – 21 | 19.0 – 19.8 mm |
| Men – usual range | 8 – 12 | P½ – X½ | 57 – 67 | 16 – 26 | 18.1 – 21.4 mm |
No official body publishes a national average, so these figures reflect what jewellers and sizing-kit makers commonly report, and they match the sizes stocked in the largest quantities. The full conversion for every size is in the ring size chart.
Average ring size by finger
| Finger | Women (US) | Men (US) |
|---|---|---|
| Thumb | 8 – 10 | 11 – 13 |
| Index finger | 6.5 – 8.5 | 9.5 – 11.5 |
| Middle finger | 7 – 8.5 | 10 – 11.5 |
| Ring finger | 6 – 7 | 9 – 10 |
| Little finger | 4 – 5.5 | 7 – 8.5 |
These are rules of thumb built from the usual gaps between fingers (thumb about 2–3 sizes above the ring finger, little finger about 1½–2 below). Your own fingers may differ by more.
Average by region
- United States and Canada: women 6–7, men 9–10. This is why shop sample rings are commonly made in these sizes.
- United Kingdom and Australia: women L to N, men R to T – the same physical size range.
- India and Pakistan: women 12–14, men 19–21 on the local number scale (see the Indian and Pakistan charts).
- Europe: women 52–54, men 60–62 (inner circumference in mm).
Average body size varies between countries, but the published charts of large jewellers in these regions overlap almost completely, so the same physical range applies.
Why averages are only a starting point
Two people of the same height can be three sizes apart. Ring size depends on bone structure, knuckle size, body weight, hand use (manual work tends to enlarge fingers) and even the time of day: fingers are smaller in the morning and in the cold, and larger in the evening, in hot weather and during pregnancy. A ring bought in the “average” size fits roughly half the people who receive it. If a ring is a gift, choose a jeweller that offers free resizing, and avoid materials that cannot be resized, such as tungsten or ceramic.
How to find someone’s ring size secretly
- Borrow a ring they wear on the right finger. Place it on the online ring sizer for half a minute and put it back. This is by far the most reliable method.
- Use a ring from another finger and adjust. A ring from the right-hand ring finger is usually about the same or up to half a size larger than the left. A ring from the middle finger is usually about one size too big for the ring finger; go down one size.
- Trace the inside of a ring on paper with a sharp pencil, then measure the inner edge of the circle in mm and use ring size by diameter.
- Ask a friend or family member who knows their size or can try on rings with them.
- When nothing else works, buy the upper end of the average (US 7 for women, US 10 for men) from a jeweller with free resizing. Making a ring smaller is easier and cheaper than making it larger.
Not sure of your ring size? Measure it on your phone screen in 30 seconds.
Open the free ring sizer →Related
- Women’s ring size chart and men’s ring size chart
- How to measure ring size at home
- How should a ring fit?
- Can you resize a ring?
Frequently asked questions
What is the average ring size for a woman?
US 6 to 7, which is UK L½ to N½, EU 52 to 54 and 16.5 to 17.3 mm inner diameter.
What is the average ring size for a man?
US 9 to 10, which is UK R½ to T½, EU 60 to 62 and 19.0 to 19.8 mm inner diameter.
What ring size should I buy if I do not know her size?
US 7 (UK N½, 17.3 mm) covers the upper end of the women’s average and is easier to make smaller than larger. Choose a jeweller with free resizing.
Is your ring size the same on both hands?
Often not. The dominant hand is commonly up to half a size larger, so measure the hand the ring will be worn on.
Does ring size change with age?
Yes. Fingers often get larger with age, weight gain and arthritis, and the knuckles in particular can grow. Recheck your size every few years.