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OP/ED
US, British & European Ring Sizes
The most common U.S.A. ring sizes for women are 6 and 7. For men, sizes 10 and 11 are most common.
The U.S.A. uses a numeric ring size system from 1-13
UK Ring sizes use an alphabetic system from A-Z
The European ring size system is numeric from 38-70. It is the interior circumference measurement in millimeters.
US
Brit
Euro
3
F
44
F½
45
3½
G
4
H
46
4½
H½
47
I
48
5
J
49
J½
50
5½
K
K½
51
6
L
52
L½
6½
M
53
M½
7
N
54
N½
55
7½
O
O½
56
8
P
57
P½
Q
8½
58
Q½
R
59
9
R½
60
S
9½
S½
61
T
10
T½
62
U
63
10½
U½
V
64
V½
11
W
65
W½
11½
66
X
X½
67
12
Y
68
Y½
12½
Z
69
Z½
13
70
Sizes within 0.01mm have been equated.
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