Sizing Chart
Ring Size
|
Internal Diameter (mm)
|
Circumference (mm)
|
US & Canada Size
|
Japan Size
|
|
14.9
|
46.8
|
4
|
9
|
|
15.7
|
49.3
|
5
|
12
|
|
16.5
|
51.9
|
6
|
14
|
|
17.3
|
54.4
|
7
|
16
|
|
18.1
|
57.0
|
8
|
18
|
|
19.0
|
59.5
|
9
|
20
|
|
19.8
|
62.1
|
10
|
22
|