Measure ring size at homeWomen's ring sizing
How to measure ring size at home for women
For women's rings, especially engagement rings, measure carefully at normal body temperature and make sure the size passes over the knuckle.
Calibrate your screen
Place a real bank card on your screen. Align its top-left corner with the virtual card, then use the slider until the virtual card's left vertical edge matches exactly.
Standard bank card short edge: 53.98 mm. No camera, no upload, no card number needed.
Measure finger circumference
Wrap paper or string around the finger base, mark the overlap, then lay it straight on the ruler and drag the marker so the red line meets the end.
If your measurement falls between two sizes, choose the larger size. For wide bands or fingers that swell easily, choose a slightly larger size.
Quick answer: How to measure ring size at home for women
Measure the finger base with paper, string, or tape, then confirm the size can pass over the knuckle. Use the larger row if the result sits between two sizes.
- Wrap paper or string around the finger base.
- Mark the overlap and measure the length.
- Check that the recommended size can pass over the knuckle.
Women's ring size calculator
Enter circumference or diameter for engagement rings, wedding bands, or fashion rings.
If your measurement falls between two sizes, choose the larger size.
How to measure your finger
A secure ring still needs to move over the knuckle without pain.
Engagement fit
Wrap paper or string around the finger base.
Wrap and mark
Mark the overlap and measure the length.
Choose the larger row
For stacked or wide rings, consider extra comfort room.
Average women's ring size
Average sizes can help sanity-check a result, but buying should still be based on measured circumference.
How to measure a woman's finger
Measure at normal body temperature. Fingers can swell during heat, pregnancy, or after exercise, so measure more than once if fit matters.
Women's ring size chart
Use the chart to convert circumference into US / CA, ISO / EU, UK / AU, JP / CN, IT / ES / CH, and RU sizes.
Engagement ring fit tips
A ring should feel secure at the base but still move over the knuckle without pain.
Ring size chart for this method
This table shows common conversion rows. If your measurement sits between two rows, use the larger recommended size for purchase.
| Circumference mm | Diameter mm | ISO / EU | US / CA | UK / AU | JP / CN | IT / ES / CH | RU |
|---|---|---|---|---|---|---|---|
| 44.2 | 14.1 | 44 | 3 | F | 4 | 4 | 14 |
| 45.5 | 14.5 | 46 | 3.5 | G | 5 | 5¼ | 14.5 |
| 46.8 | 14.9 | 47 | 4 | H | 7 | 6½ | 15 |
| 48.0 | 15.3 | 48 | 4.5 | I | 8 | 7¾ | 15.25 |
| 49.3 | 15.7 | 49 | 5 | J½ | 9 | 9 | 15.75 |
| 50.6 | 16.1 | 50.5 | 5.5 | K½ | 10 | 10¼ | 16.25 |
| 51.9 | 16.5 | 52 | 6 | L½ | 12 | 11½ | 16.5 |
| 53.1 | 16.9 | 53 | 6.5 | M½ | 13 | 12¾ | 17 |
| 54.4 | 17.3 | 54.5 | 7 | N½ | 14 | 14 | 17.25 |
| 55.7 | 17.7 | 56 | 7.5 | O½ | 15 | 15¼ | 17.75 |
| 57.0 | 18.1 | 57 | 8 | P½ | 16 | 16½ | - |
| 58.3 | 18.6 | 58.5 | 8.5 | Q½ | 17 | 17¾ | 18.5 |
| 59.5 | 18.9 | 60 | 9 | R½ | 18 | 19 | 19 |
| 60.8 | 19.4 | 61 | 9.5 | S½ | 19 | 20¼ | 19.5 |
| 62.1 | 19.8 | 62 | 10 | T½ | 20 | 21½ | 19.75 |
| 63.4 | 20.2 | 63.5 | 10.5 | U½ | 22 | 22¾ | - |
| 64.6 | 20.6 | 65 | 11 | V½ | 23 | 24 | 20.75 |
| 65.9 | 21.0 | 66 | 11.5 | W½ | 24 | 25¼ | 21 |
| 67.2 | 21.4 | 67.5 | 12 | X½ | 25 | 26½ | 21.5 |
| 68.5 | 21.8 | 69 | 12.5 | Z | 26 | 27¾ | 21.75 |
| 69.7 | 22.2 | 70 | 13 | - | 27 | 29 | 22 |
Conversion examples
| Input | Millimeters | Recommendation |
|---|---|---|
| 50.6 mm | US 5.5 | Smaller range |
| 54.4 mm | US 7 | Common range |
| 57.0 mm | US 8 | Larger range |
FAQ
What is an average women's ring size?
Many women's rings fall around US 6 to 7, but finger and knuckle shape vary. Measure before buying.
Should an engagement ring fit tighter?
It should feel secure, but it should not hurt or get stuck. If you are between rows, choose the larger listed size.
Should I size up if I am between two ring sizes?
Yes. For online buying, choose the larger listed size when your measurement falls between two rows. A ring that is slightly loose is easier to adjust than one that will not pass the knuckle.
Is circumference or diameter better for ring sizing?
Circumference is safer for measuring a finger at home. Diameter is useful when measuring an existing ring, but it should be converted back to circumference before choosing a purchase size.
When should I measure my finger?
Measure near the end of the day at normal body temperature. Cold hands can shrink and hot weather can make fingers swell.