About Ring Sizes
Depending on the product, ring sizes are indicated either in Japanese standard sizes or as S/M/L. For products marked S/M/L, the corresponding standard sizes are listed on the product page; please refer to them along with the size chart below.
Ring Size Chart
| Ring Size (JP) |
Inner Diameter (mm) |
Inner Circumference (mm) |
| Size 1 |
13 |
40.84 |
| Size 2 |
13.33 |
41.89 |
| Size 3 |
13.66 |
42.94 |
| Size 4 |
14 |
43.98 |
| Size 5 |
14.33 |
45.03 |
| Size 6 |
14.66 |
46.08 |
| Size 7 |
15 |
47.12 |
| Size 8 |
15.33 |
48.17 |
| Size 9 |
15.66 |
49.22 |
| Size 10 |
16 |
50.27 |
| Size 11 |
16.33 |
51.31 |
| Size 12 |
16.66 |
52.36 |
| Size 13 |
17 |
53.41 |
| Size 14 |
17.33 |
54.45 |
| Size 15 |
17.66 |
55.5 |
| Size 16 |
18 |
56.55 |
| Size 17 |
18.33 |
57.6 |
| Size 18 |
18.66 |
58.64 |
| Size 19 |
19 |
59.69 |
| Size 20 |
19.33 |
|
Size 21 |
19.66 |
|
Size 22 |
|
| Size 23 |
|
| Size 24 |
|
| Size 25 |
|
Ring Width and Sizing Tips
The fit of a ring can vary depending on its design and width. Wide rings (voluminous designs) have a larger surface area in contact with the finger, so they may feel tighter than a slimmer ring of the same size. Therefore, when choosing a wider design, we recommend selecting a size about one size larger than you typically wear.
International Ring Size Conversion Chart
Ring size standards vary by country and region. If you are familiar with international sizing, please use the conversion chart below as a guide to find your best fit.
International Ring Size Conversion Chart
| Japan |
US |
Italy |
| Size 1 |
1 |
1 |
| Size 2 |
2 |
2 |
| Size 3 |
2.5 |
3 |
| Size 4 |
3 |
4 |
| Size 5 |
3.5 |
5 |
| Size 6 |
3.75 |
6 |
| Size 7 |
4 |
7 |
| Size 8 |
4.5 |
8 |
| Size 9 |
5 |
9 |
| Size 10 |
5.25 |
10 |
| Size 11 |
5.75 |
11 |
| Size 12 |
6 |
12 |
| Size 13 |
6.5 |
13 |
| Size 14 |
7 |
14.5 |
| Size 15 |
7.5 |
15.5 |
| Size 16 |
7.75 |
16.5 |
| Size 17 |
8 |
17.5 |
| Size 18 |
8.5 |
18.5 |
| Size 19 |
9 |
19.5 |
| Size 20 |
9.5 |
21 |
| Size 21 |
9.75 |
22 |
| Size 22 |
10 |
23 |
| Size 23 |
10.5 |
24 |
| Size 24 |
11 |
25 |
| Size 25 |
11.5 |
26 |
Need help choosing your ring size?
If you are unsure if the size will fit or if you would prefer a slightly different size, please feel free to reach out to us.
We are happy to assist you in any way we can to ensure the ring looks its best on your hand.
Size Exchanges
If the ring you received does not fit, we are happy to exchange the size if you contact us within 7 days of delivery (limited to orders shipped within Japan).
For detailed terms and conditions, please see our Returns & Exchanges page.
If you have any other questions, please feel free to contact us through any of the channels below:
