How To Measure Your Ring Size
There are a few ways to determine your perfect fit. You can measure an existing ring or measure your finger directly.
Method 1
Measure an Existing Ring
- Select a ring that properly fits the intended finger.
- Place the ring on a ruler and measure the internal diameter in millimeters (mm).
- Ensure you are measuring the inside of the band, not including the metal casing.
- Use the Diameter column in the chart below to find your size.
Method 2
Measure with String or Paper
- Cut a thin strip of paper or non-stretchy string about 100mm long.
- Wrap the paper around the base of the finger you intend to wear the ring on.
- Mark the spot where the paper overlaps with a pen.
- Measure the length of the paper strip in millimeters (mm).
- Use the Circumference column in the chart to find your size.
Ring Size Conversion Chart
| Circumference (mm) | Diameter (mm) | US / Canada | AU / UK / IE / NZ | EU / ISO |
|---|---|---|---|---|
| 44.14 | 14.1 | 3 | F | 44 |
| 44.74 | 14.2 | 3.25 | F 1/2 | 45 |
| 45.40 | 14.5 | 3.5 | G | 45 |
| 46.02 | 14.6 | 3.75 | G 1/2 | 46 |
| 46.80 | 14.9 | 4 | H | 47 |
| 47.40 | 15.1 | 4.25 | H 1/2 | 47 |
| 48.00 | 15.3 | 4.5 | I | 48 |
| 48.70 | 15.5 | 4.75 | J | 49 |
| 49.30 | 15.7 | 5 | J 1/2 | 49 |
| 50.00 | 15.9 | 5.25 | K | 50 |
| 50.60 | 16.1 | 5.5 | K 1/2 | 51 |
| 51.20 | 16.3 | 5.75 | L | 51 |
| 51.90 | 16.5 | 6 | L 1/2 | 52 |
| 52.50 | 16.7 | 6.25 | M | 53 |
| 53.10 | 16.9 | 6.5 | M 1/2 | 53 |
| 53.80 | 17.1 | 6.75 | N | 54 |
| 54.40 | 17.3 | 7 | N 1/2 | 54 |
| 55.10 | 17.5 | 7.25 | O | 55 |
| 55.70 | 17.7 | 7.5 | O 1/2 | 56 |
| 56.30 | 17.9 | 7.75 | P | 56 |
| 57.00 | 18.1 | 8 | P 1/2 | 57 |
| 57.60 | 18.3 | 8.25 | Q | 58 |
| 58.30 | 18.6 | 8.5 | Q 1/2 | 58 |
| 58.90 | 18.7 | 8.75 | R | 59 |
| 59.50 | 18.9 | 9 | R 1/2 | 60 |
| 60.20 | 19.2 | 9.25 | S | 60 |
| 60.80 | 19.4 | 9.5 | S 1/2 | 61 |
| 61.40 | 19.5 | 9.75 | T | 61 |
| 62.10 | 19.8 | 10 | T 1/2 | 62 |
| 62.70 | 20.0 | 10.25 | U | 63 |
| 63.40 | 20.2 | 10.5 | U 1/2 | 63 |
| 64.00 | 20.4 | 10.75 | V | 64 |
| 64.60 | 20.6 | 11 | V 1/2 | 65 |
| 65.30 | 20.8 | 11.25 | W | 65 |
| 65.90 | 21.0 | 11.5 | W 1/2 | 66 |
| 66.60 | 21.2 | 11.75 | X | 67 |
| 67.20 | 21.4 | 12 | X 1/2 | 67 |
| 67.80 | 21.6 | 12.25 | Y | 68 |
| 68.50 | 21.8 | 12.5 | Z | 69 |
| 69.10 | 22.0 | 12.75 | Z 1/2 | 69 |
| 69.70 | 22.2 | 13 | - | 70 |
| 70.40 | 22.4 | 13.25 | Z1 | 70 |
| 71.00 | 22.6 | 13.5 | - | 71 |
| 71.70 | 22.8 | 13.75 | Z2 | 72 |
| 72.30 | 23.0 | 14 | Z3 | 72 |
| 72.90 | 23.2 | 14.25 | - | 73 |
| 73.60 | 23.4 | 14.5 | Z4 | 74 |
| 74.20 | 23.6 | 14.75 | - | 74 |
| 76.10 | 24.2 | 15 | - | 76 |