International Ring Size Chart
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1INTERNATIONAL RING SIZE CHART
Circumference (mm)
Diameter (mm)
UK, N Z ,
United States
Asia
and Australia
and Canada
Switzerland
(Most EU countries, including Germany and France)
(Hong Kong, China, Singapore,
Taiwan, Japan, and Macau)
14.1
44.2
F
3
4
4
44.8
14.3
F½
5
5¼
45.5
14.5
3½
G
46.1
14.7
G½
6
6½
46.8
14.9
H
4
7
47.4
15.1
H½
7¾
48.0
15.3
I
4½
8
48.7
15.5
J
9
49.3
15.7
J½
5
9
50.0
15.9
10
K
50.6
16.1
K½
5½
10
51.2
16.3
L
11¾
51.9
16.5
L½
6
11
12¾
52.5
16.7
12
M
53.1
16.9
M½
6½
13
14
53.8
17.1
N
54.4
17.3
N½
7
14
15¼
55.1
17.5
O
55.7
17.7
O½
7½
15
16½
56.3
17.9
P
57.0
18.1
P½
8
16
17¾
57.6
18.3
Q
58.3
18.5
Q½
8½
17
58.9
18.8
R
19
59.5
19.0
18
R½
9
60.2
19.2
S
20¼
19.4
60.8
S½
9½
19
61.4
19.6
T
21½
62.1
19.8
10
20
T½
62.7
20.0
U
21
63.4
20.2
U½
10½
22
22¾
64.0
20.4
V
64.6
20.6
V½
11
23
65.3
20.8
W
25
65.9
21.0
W½
11½
24
66.6
21.2
X
67.2
21.4
X½
12
25
27½
67.8
21.6
Y
68.5
21.8
Z
12½
26
28¾
69.1
22.0
Z½
69.7
22.2
13
27
70.4
22.4
Z+1
71.0
22.6
13½
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