Ring Size GuideFinding Your Ring Size
Tips for Choosing Your Ring Size
01Band Width
For wider rings, we recommend choosing a slightly larger size than usual. If you plan to wear a wedding band and engagement ring together and their combined width exceeds 4–5 mm, a larger size is a good idea.
02Weather & Time of Day
Fingers shrink in the cold and swell in the heat, so a size measured in winter may differ from one measured in summer. Humidity and altitude can also affect ring size, so please take them into account.
03Comfortable Fit
Ideally, a ring should fit your finger snugly, but a ring that is too tight can restrict circulation. Choose a size that slides over your knuckle yet stays in place during everyday activities.
Ring Size Chart
All OHARA PEARL ring sizes are shown in Japanese standard sizes.
| OHARA PEARL Size (Japan) | Inner Diameter(mm) | Inner Circumference(mm) |
|---|---|---|
| 4 | 14 | 44 |
| 5 | 14.3 | 45 |
| 6 | 14.6 | 46.1 |
| 7 | 15 | 47.1 |
| 8 | 15.3 | 48.2 |
| 9 | 15.6 | 49.2 |
| 10 | 16 | 50.3 |
| 11 | 16.3 | 51.3 |
| 12 | 16.6 | 52.4 |
| 13 | 17 | 53.4 |
| 14 | 17.3 | 54.5 |
| 15 | 17.6 | 55.5 |
| 16 | 18 | 56.6 |
| 17 | 18.3 | 57.6 |
| 18 | 18.6 | 58.6 |
| 19 | 19 | 59.7 |