Posted on December 19 2025
Things You'll Need
Ruler
Thin strip of paper
- Cut a thin strip of paper
- Wrap the paper tight around your finger. Make sure the paper is below the joint of your finger and close to your knuckle.
- Mark the spot where the paper meets and measure the distance with your ruler.
- Use the following chart to determine your ring size. Rings also come in half sizes, the measurements of which, of course, will fall somewhere in between the whole sizes.
| US Ring Size | Perimeter/MM |
| 4 | 46.47 |
| 4.5 | 48.04 |
| 5 | 49.03 |
| 5.5 | 50.55 |
| 6 | 51.81 |
| 6.5 | 53.07 |
| 7 | 54.32 |
| 7.5 | 55.74 |
| 8 | 57.15 |
| 8.5 | 59.40 |