Size Guide
How to Measure Your Ring Size
Method 1: Measure Finger Circumference
- Wrap a thin strip of paper or non-stretching string snugly around the base of your intended finger.
- Mark the exact point where the ends overlap with a pen.
- Lay the paper/string flat against a ruler to measure the length in millimeters (mm).
- Match your measurement with the Inner Circumference column in the chart above.
Method 2: Measure an Existing Ring
- Choose a ring that fits the desired finger perfectly.
- Measure the internal diameter across the widest center point (from inner edge to inner edge) in millimeters (mm).
- Match your measurement with the Inner Diameter column in the chart above.
| US Size | Inner Circumference (mm) | Inner Circumference (cm) | Inner Diameter (mm) |
| 5 | 49.3 mm | 4.93 cm | 15.7 mm |
| 5.5 | 50.6 mm | 5.06 cm | 16.1 mm |
| 6 | 51.9 mm | 5.19 cm | 16.5 mm |
| 6.5 | 53.1 mm | 5.31 cm | 16.9 mm |
| 7 | 54.4 mm | 5.44 cm | 17.3 mm |
| 7.5 |
55.7 mm |
5.57 cm | 17.7 mm |
| 8 | 56.9 mm | 5.69 cm | 18.1 mm |
| 8.5 | 58.3 mm | 5.83 cm | 18.6 mm |
| 9 | 59.5 mm | 5.95 cm | 19.0 mm |