International Ring Size Guide Chart
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1INTERNATIONAL RING SIZE GUIDE
Size (inches)
Size (mm)
Diameter (mm)
U.S.A. size
Japanese size
British size
German size
Swiss size
1 14/16
48
15.27
4 1/2
8
I - 1/2
15 1/4
–
1 15/16
49
15.70
5
9
J 1/2
15 3/4
–
2
51
16.10
5 1/2
11
L
16
11 3/4
2 1/16
52
16.51
6
12
M
16 1/2
12 3/4
2 2/16
53
16.92
6 1/2
13
N
17
14
2 3/16
55
17.35
7
14
O
17 1/4
15 1/4
2 4/16
56
17.75
7 1/2
15
P
17 3/4
16 1/2
2 5/16
57
18.19
8
16
Q
18
17 3/4
17
Q 1/2
18 1/2
–
2 6/16
58
18.53
8 1/2
2 7/16
59
18.89
9
18
R 1/2
19
–
19
S 1/2
19 1/2
–
2 8/16
61
19.41
9 1/2
20
T 1/2
20
–
2 9/16
62
19.84
10
22
U 1/2
20 1/4
–
2 10/16
63
20.20
10 1/2
23
V 1/2
20 3/4
–
2 11/16
65
20.68
11
24
W 1/2
21
–
2 12/16
66
21.08
11 1/2
25
Y
21 1/4
27 1/2
2 13/16
68
21.49
12
26
Z
21 3/4
28 3/4
2 14/16
69
21.89
12 1/2
27
–
22
–
2 15/16
70
22.33
13
BETONY VERNON
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