Ring Size Guide
Use this guide to find your US ring size before you order. Because our pieces are made to order, and rings resized specifically for you are not eligible for non-quality returns where permitted by law, it is worth taking a careful measurement first.
US Ring Size Chart
Standard US ring sizes with the inside diameter and inside circumference of the ring in millimeters. Values are rounded to the nearest 0.1 mm.
| US size | Inside diameter (mm) | Inside circumference (mm) |
|---|---|---|
| 3 | 14.1 | 44.2 |
| 3.5 | 14.5 | 45.5 |
| 4 | 14.9 | 46.8 |
| 4.5 | 15.3 | 48.0 |
| 5 | 15.7 | 49.3 |
| 5.5 | 16.1 | 50.6 |
| 6 | 16.5 | 51.9 |
| 6.5 | 16.9 | 53.1 |
| 7 | 17.3 | 54.4 |
| 7.5 | 17.7 | 55.7 |
| 8 | 18.1 | 57.0 |
| 8.5 | 18.5 | 58.3 |
| 9 | 18.9 | 59.5 |
| 9.5 | 19.4 | 60.8 |
| 10 | 19.8 | 62.1 |
| 10.5 | 20.2 | 63.4 |
| 11 | 20.6 | 64.6 |
| 11.5 | 21.0 | 65.9 |
| 12 | 21.4 | 67.2 |
| 12.5 | 21.8 | 68.5 |
| 13 | 22.2 | 69.7 |
Many of our ring designs are offered in US sizes 4–11, including half sizes. The sizes available for each design are listed on its product page. For a size outside the listed range, email support@mississijewelry.com before ordering.
How to Measure Your Ring Size at Home
Method 1: Measure a ring that already fits (most reliable)
- Choose a ring that fits comfortably on the same finger of the same hand you plan to wear the new ring on.
- Place it on a ruler or, ideally, use a digital caliper.
- Measure the inside diameter in millimeters, edge to edge across the widest point of the inner circle. Do not include the metal of the band.
- Find the closest inside diameter in the chart above.
Method 2: Measure your finger with a strip of paper or string
- Cut a thin, non-stretchy strip of paper or a piece of string.
- Wrap it around the base of your finger. It should be snug but able to slide over your knuckle.
- Mark the point where the end overlaps, then lay it flat and measure the length in millimeters.
- Match that length to the inside circumference column in the chart.
String and paper can stretch or wrap unevenly, so this method is less precise than measuring a ring. Repeat it two or three times to check your result.
Method 3: Get professionally sized
For an engagement ring or any piece you plan to wear every day, a local jeweler can size your finger with professional ring sizers. This is the most accurate option if you are unsure.
Tips for an Accurate Fit
- Measure at the end of the day. Fingers tend to be slightly larger later in the day.
- Avoid temperature extremes. Cold can make fingers smaller and heat can make them larger, so measure at room temperature.
- Mind your knuckle. The ring should slide over your knuckle with slight resistance and sit comfortably at the base of your finger.
- Measure more than once. Take two or three readings, ideally on different days.
- Between two sizes? Choosing the larger size is generally the safer option.
- Consider band width. Wider bands usually feel tighter than thin bands of the same size. If you are choosing a wide band, consider having your finger measured with a wide sizer.
- Use the correct hand. Your dominant hand is often slightly larger, so measure the finger you will actually wear the ring on.
- Eternity bands. Resizing options may be limited for full-eternity bands because diamonds continue around the band, so an accurate size matters even more.
Resizing
Resizing depends on the finished setting. Please confirm your size, and ask us about resizing feasibility for your chosen design, before you order.
Need Help?
Email support@mississijewelry.com with the design you are considering and your measurement, and we will help you confirm the size before production. For more on comfort and fit, read How Should an Engagement Ring Fit? A Practical Ring Size Guide.