Why Ring Size Matters
Choosing the right ring size is one of the most important steps when purchasing a fine jewelry piece — especially for engagement rings and wedding bands. At AUREX JEWELRY, we want your ring to fit perfectly from the moment it arrives.
How to Measure Your Ring Size at Home
There are two easy methods to measure your ring size at home:
Method 1: String or Paper Strip
- Cut a thin strip of paper or use a piece of string.
- Wrap it snugly around the base of your finger (not too tight, not too loose).
- Mark where the paper or string overlaps.
- Measure the length in millimeters — this is your finger circumference.
- Use the chart below to find your size.
Method 2: Measure an Existing Ring
- Place a ring that fits well on a ruler.
- Measure the inner diameter in millimeters.
- Use the chart below to match your size.
Japan & US Ring Size Conversion Chart
| Inner Diameter (mm) | Circumference (mm) | Japan Size | US Size |
|---|---|---|---|
| 14.0 | 44.0 | 1 | 2 |
| 14.4 | 45.2 | 3 | 2.5 |
| 14.8 | 46.5 | 5 | 3 |
| 15.2 | 47.8 | 7 | 3.5 |
| 15.6 | 49.0 | 9 | 4 |
| 16.0 | 50.3 | 11 | 4.5 |
| 16.5 | 51.8 | 13 | 5 |
| 16.9 | 53.1 | 15 | 5.5 |
| 17.3 | 54.4 | 17 | 6 |
| 17.7 | 55.7 | 19 | 6.5 |
| 18.2 | 57.2 | 21 | 7 |
| 18.6 | 58.4 | 23 | 7.5 |
| 19.0 | 59.7 | 25 | 8 |
| 19.4 | 61.0 | 27 | 8.5 |
| 19.8 | 62.2 | 29 | 9 |
Tips for Getting the Perfect Fit
- Measure at the end of the day — fingers tend to be slightly larger in the evening.
- Avoid measuring when cold — cold temperatures can make fingers shrink temporarily.
- Consider the band width — wider bands fit more snugly; you may need to size up by half a size.
- When in doubt, size up — it's easier to resize a ring down than up.
Need Help? We're Here for You
If you're still unsure about your ring size, our team at AUREX JEWELRY is happy to assist. Contact us before placing your order and we'll guide you to the perfect fit. All our rings are crafted with precision and care — because every detail matters.