Average Ring Size for Women and Men
Averages are a starting point, not a substitute for measuring. They are most useful when you are buying a surprise gift and have nothing else to go on.
Quick answer
Women average a US 6 / UK L½ (16.45 mm). Men average a US 9 / UK R½ (19.0 mm). Most adults fall within two sizes of these numbers.
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Inside circumference, mm
Inside
Inside
Inside
Inside
Matched inside diameter 17.30 mm · circumference 54.35 mm
Conversion table
| Group | US size | UK size | Inside diameter |
|---|---|---|---|
| Women (most common) | 6–6½ | L½–M½ | 16.5–16.9 mm |
| Women (typical range) | 5–8 | J½–P½ | 15.6–18.1 mm |
| Men (most common) | 9–10 | R½–T½ | 19.0–19.8 mm |
| Men (typical range) | 8–12 | P½–X½ | 18.1–21.4 mm |
What changes the average
- Height and build: taller people generally need larger sizes.
- Which hand: the dominant hand is usually a quarter to a half size larger.
- Climate: warm countries push measurements up slightly.
- Age: finger size tends to increase gradually from the twenties onwards.
- Band width: a 8 mm band typically needs a quarter to half size more than a 2 mm band.
Using an average safely
If you buy at the average and it is wrong, you want the ring to be too big rather than too small. Combine the average with anything you know — glove size, whether their hands are slim or broad, an existing ring — before you commit.
Frequently asked questions
What is the most common women's ring size?
A US 6 (UK L½), with an inside diameter of about 16.45 mm. US 5 to 7 covers most women.
What is the most common men's ring size?
A US 9 (UK R½), about 19 mm inside diameter. US 8 to 11 covers most men.
Keep reading
For an expensive ring, confirm the size with a jeweller before ordering — see the ring size FAQs for resizing advice.