Ring Size Guide
Method 1: Measure inner diameter
- Measure the inner diameter (in mm) of a ring that fits the intended finger comfortably.
- Use the chart below to find the closest corresponding ring size.
- If your measurement falls between two sizes, choose the quarter or half size in between when available.
- If quarter sizes aren't offered, select the larger size for comfort.
Method 2: String, paper & a ruler
No reference ring? You can measure with everyday items: string (or a thin strip of paper), a ruler, and a pen.
- Wrap the string or paper around the base of your finger.
- Mark the point where the ends meet with a pen.
- Measure the length in millimeters, then divide by 3.14 (π) to find the inner diameter.
- Match your result to the closest size on the chart below.
Ring Size Chart (US/Canada)
| Ring Size | Inner Diameter (mm) |
|---|---|
| 3 | 14.1 mm |
| 3.5 | 14.5 mm |
| 4 | 14.9 mm |
| 4.5 | 15.3 mm |
| 5 | 15.7 mm |
| 5.5 | 16.1 mm |
| 6 | 16.5 mm |
| 6.5 | 16.9 mm |
| 7 | 17.3 mm |
| 7.5 | 17.7 mm |
| 8 | 18.1 mm |
| 8.5 | 18.5 mm |
| 9 | 19.0 mm |
| 9.5 | 19.4 mm |
| 10 | 19.8 mm |
| 10.5 | 20.2 mm |
| 11 | 20.6 mm |
| 11.5 | 21.0 mm |
| 12 | 21.4 mm |
| 12.5 | 21.8 mm |
| 13 | 22.2 mm |
| 13.5 | 22.6 mm |