Women's Ring Size Chart
This chart covers US 4 to 9 in half sizes, with matching UK, EU, Japanese, diameter, and circumference estimates. Use a measurement of the intended finger rather than a demographic average to choose a size.
Published by Ring Sizer · App developer: Pawel Boguta · Updated
Blue Nile's 2017 retail guidance lists US 5 to 7 as commonly purchased women's sizes, with US 6 the most popular. This is retail guidance, not a population average. Read the source.
Women's ring sizes converted
| US | Diameter | Circumference | UK | EU | Japan |
|---|---|---|---|---|---|
| 4 | 14.9 mm | 46.8 mm | H | 47 | 7 |
| 4.5 | 15.3 mm | 48.0 mm | I | 48 | 8 |
| 5 | 15.7 mm | 49.3 mm | J 1/2 | 49 | 9 |
| 5.5 | 16.1 mm | 50.6 mm | K 1/2 | 51 | 10 |
| 6 | 16.5 mm | 51.9 mm | L 1/2 | 52 | 12 |
| 6.5 | 16.9 mm | 53.1 mm | M 1/2 | 53 | 13 |
| 7 | 17.3 mm | 54.4 mm | N 1/2 | 54 | 14 |
| 7.5 | 17.7 mm | 55.7 mm | O 1/2 | 56 | 15 |
| 8 | 18.1 mm | 57.0 mm | P 1/2 | 57 | 17 |
| 8.5 | 18.5 mm | 58.2 mm | Q 1/2 | 58 | 18 |
| 9 | 18.9 mm | 59.5 mm | R 1/2 | 60 | 19 |
Sizes are unisex: a US 7 is the same physical ring whoever wears it. For the men's range, see the men's ring size chart.
Find her exact size
Averages are only a backup. To get the real size, measure a ring she already wears, or measure the finger directly. Enter the inner diameter or circumference below to convert it to every system.
US 7 is about US 7, UK N 1/2, EU 54.
Thin band chart size, with no fit adjustment.
Converted sizes
- US / Canada
- 7
- UK / Australia
- N 1/2
- EU / ISO
- 54
- Japan
- 14
- India
- 14
- Diameter
- 17.3 mm
- Circumference (mm)
- 54.4 mm
- Circumference (in)
- 2.142 in
Uses the Ring Sizer conversion model. Measured values and nominal size conversions can round differently. Use thin band for a chart conversion. See our methodology and supported ranges.
Frequently asked questions
- What is the average women's ring size?
- Blue Nile's 2017 retail guidance lists US 5 to 7 as commonly purchased women's sizes, with US 6 the most popular. This is retail guidance, not a population average.
- What is a women's size 7 ring in UK and EU?
- A US 7 is about UK N 1/2 and EU 54, with an inner diameter of roughly 17.3 mm and a circumference near 54 mm.
- Are women's and men's ring sizes different?
- No. The sizing systems are unisex, so a US 7 is the same nominal size regardless of who wears it.
- How do I find her ring size without her knowing?
- Borrow a ring she already wears on the right finger and measure its inner diameter, then enter it in the converter. If you cannot measure, ask the retailer about a sizing kit and resizing options.
Sources and methodology
Read our conversion rules, supported ranges, and measurement limitations.
Get your exact size, without the jeweler
Buying for her? Skip the guesswork. Measure her ring right on screen and read the size in every system at once, the most accurate option short of a trip to the jeweler, with the Ring Sizer app, free to download with in-app purchases.
Download Ring Sizer- Free download · In-app purchases
- iOS
- No sign-up
- Works offline
