RING SIZE GUIDE
Find your perfect fit before you order.
METHOD 1 — MEASURE AN EXISTING RING
The easiest method if you already own a ring that fits perfectly.
Place it on a ruler and measure the inner diameter in millimeters. Match it to the table below.
METHOD 2 — MEASURE YOUR FINGER
Wrap a thin strip of paper around the base of your finger.
Mark where the ends meet and measure the length in millimeters — this is your finger circumference.
Match it to the table above.
- Measure at the end of the day when fingers are slightly larger.
- Avoid measuring when fingers are cold — they shrink.
- For wide band rings, we recommend choosing 1–2 sizes larger for a more comfortable fit.
- If you are between sizes, choose the larger size.
RING SIZE TABLE
| Inner Diameter (mm) |
Japanese Size |
EU Size |
US Size |
Circumference (mm) |
| 13.7 |
3 |
42 |
3 |
42.9 |
| 14.4 |
5 |
44.5 |
3½ |
45.0 |
| 15.0 |
7 |
47 |
4½ |
47.1 |
| 15.7 |
9 |
49 |
5 |
49.2 |
| 16.4 |
11 |
51 |
6 |
51.3 |
| 17.0 |
13 |
53 |
6½ |
53.4 |
| 17.7 |
15 |
55.5 |
7½ |
55.5 |
| 18.4 |
17 |
57.5 |
8½ |
57.6 |
| 19.0 |
19 |
59.5 |
9 |
59.7 |
| 19.7 |
21 |
62 |
10 |
61.8 |
| 20.4 |
23 |
64 |
10½ |
63.9 |
| 21.0 |
25 |
66 |
11½ |
66.0 |
| 21.7 |
27 |
68 |
12½ |
68.0 |
| 22.3 |
29 |
70 |
13 |
70.1 |
JAPANESE SIZING
Our rings use official Japanese sizing (号 – Go), the standard used for all rings we import directly from Japan.
Not sure about your size?
Visit our store — we have sample rings in all available sizes for you to try.
