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Ring Size Chart
| Japan |
US |
Inside-Diameter |
Circumference |
| 日本 |
アメリカ |
指輪の直径 |
指周り 内径 |
| 1 |
1
|
13.0mm
|
40.8mm
|
| 2 |
2
|
13.4mm
|
41.9mm
|
| 3 |
2.5
|
13.7mm
|
42.9mm
|
| 4 |
3
|
14.0mm
|
44.0mm
|
| 5 |
3-31/2
|
14.3mm
|
45.0mm
|
| 6 |
31/2- 4
|
14.7mm
|
46.1mm
|
| 7 |
4
|
15.0mm
|
47.1mm
|
| 8 |
41/2-5
|
15.3mm
|
48.2mm
|
| 9 |
5
|
15.7mm
|
49.2mm
|
| 10 |
51/2
|
16.0mm
|
50.3mm
|
| 11 |
6
|
16.4mm
|
51.3mm
|
| 12 |
6-61/2
|
16.7mm
|
52.4mm
|
| 13 |
61/2-7
|
17.0mm
|
53.4mm
|
| 14 |
7-71/2
|
17.4mm
|
54.5mm
|
| 15 |
71/2-8
|
17.7mm
|
55.5mm
|
| 16 |
8
|
18.0mm
|
56.6mm
|
| 17 |
81/2
|
18.4mm
|
57.6mm
|
| 18 |
9
|
18.7mm
|
58.6mm
|
| 19 |
91/2
|
19.0mm
|
59.7mm
|
| 20 |
10
|
19.4mm
|
60.7mm
|
| 21 |
101/4
|
19.7mm
|
61.8mm
|
| 22 |
101/2
|
20.0mm
|
62.8mm
|
| 23 |
11
|
20.4mm
|
63.9mm
|
| 24 |
111/2
|
20.7mm
|
64.9mm
|
| 25 |
12
|
21.0mm
|
66.0mm
|
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