Rings
Our rings are made to the inner diameter in millimeters, sizes 14 to 20 mm. In the United States each size is shown as its US size; checkout and your order confirmation show both, for example 16 mm (US 5.5).
Our ring sizes
| Inner diameter, mm | Circumference, mm | US | UK | EU | Japan |
|---|---|---|---|---|---|
| 14 | 44.0 | 3 | F | 44 | 4 |
| 15 | 47.1 | 4 | H½ | 47 | 7 |
| 16 | 50.3 | 5.5 | K½ | 50.5 | 10 |
| 17 | 53.4 | 7 | M½ | 53.5 | 13 |
| 18 | 56.5 | 8 | P½ | 56.5 | 16 |
| 19 | 59.7 | 9 | R½ | 59.5 | 19 |
| 20 | 62.8 | 10.5 | U½ | 63 | 22 |
US, UK and Japanese sizes are close equivalents. The EU size here is the inner circumference of our ring, rounded to half a millimeter; the chart below lists standard EU sizes, so the EU figure for the same US size can differ by 0.5.
All sizes
Find your size from any system. The EU size equals the finger circumference in millimeters.
| US | EU | UK | Japan | Diameter, mm | Circumference, mm |
|---|---|---|---|---|---|
| 3 | 44 | F½ | 4 | 14.1 | 44.2 |
| 3.5 | 45.5 | G½ | 5 | 14.5 | 45.5 |
| 4 | 47 | H½ | 7 | 14.9 | 46.8 |
| 4.5 | 48 | I½ | 8 | 15.3 | 48.0 |
| 5 | 49 | J½ | 9 | 15.7 | 49.3 |
| 5.5 | 51 | K½ | 10 | 16.1 | 50.6 |
| 6 | 52 | L½ | 12 | 16.5 | 51.9 |
| 6.5 | 53 | M½ | 13 | 16.9 | 53.1 |
| 7 | 54.5 | N½ | 14 | 17.3 | 54.4 |
| 7.5 | 56 | O½ | 15 | 17.7 | 55.7 |
| 8 | 57 | P½ | 16 | 18.1 | 57.0 |
| 8.5 | 58 | Q½ | 18 | 18.5 | 58.3 |
| 9 | 59.5 | R½ | 19 | 18.9 | 59.5 |
| 9.5 | 61 | S½ | 20 | 19.4 | 60.8 |
| 10 | 62 | T½ | 21 | 19.8 | 62.1 |
| 10.5 | 63.5 | U½ | 22 | 20.2 | 63.4 |
| 11 | 64.5 | V½ | 24 | 20.6 | 64.6 |
| 11.5 | 66 | W½ | 25 | 21.0 | 65.9 |
| 12 | 67 | X½ | 26 | 21.4 | 67.2 |
Fit
Adjust the measured size for the band and the way you wear the ring.
| Fit | Choose |
|---|---|
| Narrow band, under 4 mm | Your measured size |
| Wide band, 6 mm and over | +0.5 US size (about +0.4 mm); between two of our sizes, choose the larger |
| Knuckle noticeably larger than the base | Between the knuckle and the base, closer to the knuckle |
| Worn over another ring or in cold weather | +0.5 US size (about +0.4 mm); between two of our sizes, choose the larger |
How to find your ring size
Measure your finger at rest and at room temperature: finger circumference can shift slightly throughout the day.
- The most reliable method is to measure the inner diameter of a ring that already fits the intended finger.
- If you do not have a ring, wrap a thin paper strip or non-elastic thread around the base of the finger and measure the circumference in millimeters.
- Find the circumference in the table. The ring should pass over the knuckle without sliding off.