Wrap it around the base of your finger. Make sure it's snug but not tight.
Use a pen to mark where the ends meet. This is the circumference of your finger.
Use a ruler to measure the strip in millimeters. This is your ring size circumference.
Use the chart below to find your corresponding ring size in your country's standard.
Tip: The best time to measure your finger is at the end of the day when it’s largest. Avoid measuring when your fingers are cold.
| US / CA | UK / AU / IE / NZ | JP / IN / CN / SA | ES / IT / NL / CH | Inside Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|---|
| 3 | F | 4 | 4.25 | 14.05 | 44.14 |
| 3.25 | F½ | - | 4.75 | 14.24 | 44.74 |
| 3.5 | G | 5 | 5.5 | 14.45 | 45.40 |
| 3.75 | G½ | 6 | 6 | 14.65 | 46.02 |
| 4 | H | 7 | 6.75 | 14.88 | 46.80 |
| 4.25 | H½ | - | 7.5 | 15.09 | 47.40 |
| 4.5 | I | 8 | 8 | 15.29 | 48.00 |
| 4.75 | J | - | 8.75 | 15.49 | 48.70 |
| 5 | J½ | 9 | 9.25 | 15.70 | 49.30 |
| 5.25 | K | - | 10 | 15.90 | 50.00 |
| 5.50 | K½ | - | 10.5 | 16.1 | 50.60 |
| 5.75 | L | - | 11.25 | 16.31 | 51.20 |
| 6 | L½ | 11 | 11.75 | 16.51 | 51.90 |
| 6.25 | M | 12 | 12.5 | 16.71 | 52.50 |
| 6.50 | M½ | 13 | 13.25 | 16.92 | 53.10 |
| 6.75 | N | - | 13.75 | 17.12 | 53.80 |
| 7 | N½ | 14 | 14.5 | 17.32 | 54.40 |
| 7.25 | O | - | 15 | 17.53 | 55.10 |
| 7.50 | O½ | 15 | 15.75 | 17.73 | 55.70 |
| 7.75 | P | - | 16.25 | 17.93 | 56.30 |
| 8 | P½ | 16 | 17 | 18.14 | 57 |
| 8.25 | Q | - | 17.5 | 18.34 | 57.60 |
| 8.50 | Q½ | 17 | 18.25 | 18.54 | 58.30 |
| 8.75 | R | - | 19 | 18.75 | 58.90 |
| 9 | R½ | 15 | 19.50 | 18.95 | 59.50 |
| 9.25 | S | - | 20.25 | 19.15 | 60.20 |
| 9.50 | S½ | 19 | 20.75 | 19.35 | 60.80 |
| 9.75 | T | - | 21.50 | 19.56 | 61.40 |
| 10 | T½ | 20 | 22 | 19.76 | 62.10 |
| 10.25 | U | 21 | 22.75 | 19.96 | 62.70 |
| 10.50 | U½ | 22 | 23.25 | 20.17 | 63.40 |
| 10.75 | V | - | 24 | 20.37 | 64 |
| 11 | V½ | 23 | 24.75 | 20.57 | 64.60 |
| 11.25 | W | - | 25.25 | 20.78 | 65.30 |
| 11.50 | W½ | 24 | 26 | 20.98 | 65.90 |
| 11.75 | X | - | 26.50 | 21.18 | 66.60 |
| 12 | X½ | 25 | 27.25 | 21.39 | 67.20 |
| 12.25 | Y | - | 27.75 | 21.54 | 67.80 |
| 12.50 | Z | 26 | 28.50 | 21.79 | 68.50 |
| 12.75 | Z½ | - | 29 | 22 | 69.10 |
| 13 | - | 27 | 29.75 | 22.20 | 69.70 |
| 13.25 | Z1 | - | 30.50 | 22.40 | 70.40 |
| 13.50 | - | - | 31 | 22.61 | 71.00 |
| 13.75 | Z2 | - | 31.75 | 22.81 | 71.70 |
| 14 | Z3 | 27 | 32.25 | 23.01 | 72.30 |
| 14.25 | - | - | 33 | 23.22 | 72.90 |
| 14.50 | Z4 | - | 33.5 | 23.42 | 73.60 |
| 14.75 | - | - | 34.25 | 23.62 | 74.20 |
| 15 | - | - | 34.75 | 24.23 | 76.10 |