Ring Size Guide
Ring Size Guide
Our rings are sized according to Japanese Industrial Standards (JIS) ring sizes.
How to Measure Your Size
- Measure the inside diameter of a ring you already own with a ruler.
- Refer to the conversion table below to find the corresponding ring size for your measurement.
Size Conversion Table
| Size | Inner Diameter (mm) | Guide |
|---|---|---|
| JP 7 | 14.1 | Slender fingers (pinky/ring finger) |
| JP 9 | 14.9 | Slender ring finger |
| JP 11 | 15.7 | Standard ring finger |
| JP 13 | 16.5 | Standard middle/index finger |
| JP 15 | 17.3 | Thicker fingers |
Please Note
Finger size can vary depending on the time of day and your physical condition. We recommend measuring in the evening when your hands are slightly warm.
If the size is not right, we offer a free size exchange within one month of purchase, provided the item is unused.