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What Is a Ring Size?
A ring size represents the inside measurement of a ring. In the United States, ring sizes are shown as numbers, such as size 5, 6, 7, or 8.
Ring sizing may be based on:
- The inner diameter of a ring
- The inner circumference of a ring
- The measurement around your finger
Different countries use different sizing systems, so always check whether the chart displays US, UK, European, or international ring sizes.
US Ring Size Chart
Use the chart below to compare US ring sizes with their corresponding inside diameter and circumference measurements in millimeters and inches.
| US Size | Inside Diameter | Inside Circumference | Diameter (in) | Circumference (in) |
|---|---|---|---|---|
| 3 | 14.1 mm | 44.2 mm | 0.554 | 1.740 |
| 3.5 | 14.5 mm | 45.5 mm | 0.570 | 1.791 |
| 4 | 14.9 mm | 46.8 mm | 0.586 | 1.843 |
| 4.5 | 15.3 mm | 48.0 mm | 0.602 | 1.890 |
| 5 | 15.7 mm | 49.3 mm | 0.618 | 1.941 |
| 5.5 | 16.1 mm | 50.6 mm | 0.634 | 1.992 |
| 6 | 16.5 mm | 51.9 mm | 0.650 | 2.043 |
| 6.5 | 16.9 mm | 53.1 mm | 0.665 | 2.091 |
| 7 | 17.3 mm | 54.4 mm | 0.682 | 2.142 |
| 7.5 | 17.7 mm | 55.7 mm | 0.698 | 2.193 |
| 8 | 18.1 mm | 57.0 mm | 0.714 | 2.244 |
| 8.5 | 18.6 mm | 58.3 mm | 0.731 | 2.295 |
| 9 | 18.9 mm | 59.5 mm | 0.746 | 2.343 |
| 9.5 | 19.4 mm | 60.8 mm | 0.762 | 2.394 |
| 10 | 19.8 mm | 62.1 mm | 0.778 | 2.445 |
| 10.5 | 20.2 mm | 63.4 mm | 0.795 | 2.496 |
| 11 | 20.6 mm | 64.6 mm | 0.810 | 2.543 |
| 11.5 | 21.0 mm | 65.9 mm | 0.826 | 2.594 |
| 12 | 21.4 mm | 67.2 mm | 0.842 | 2.646 |
| 12.5 | 21.8 mm | 68.5 mm | 0.858 | 2.697 |
| 13 | 22.2 mm | 69.7 mm | 0.873 | 2.744 |
Printable Ring Size Chart
Use the Mivaan printable ring size chart for a convenient visual size reference. The downloadable PDF can help you compare a well-fitting ring with standard US ring sizes.
For accurate printing, select Actual Size or 100% Scale in your printer settings. Do not use the “Fit to Page” option, as it may change the size of the chart.
Frequently Asked Questions
A ring size chart compares standard ring sizes with the ring’s inside diameter and inside circumference. It helps you identify the corresponding US ring size using measurements in millimeters or inches.
Yes. Mivaan Fine Jewelry primarily uses standard US ring sizes. Refer to the size chart to compare the ring size with its inner diameter and circumference.
Inner circumference is the total distance around the inside of the ring. It is usually shown in millimeters.
A printable chart can provide a useful estimate when printed correctly. For the best result, check the scale guide on the PDF and avoid selecting “Fit to Page” in the printer settings.
For step-by-step sizing instructions, visit Mivaan’s complete How to Measure Ring Size guide.
The average women’s ring size is 6–7, while the average men’s ring size is 9–10.