International Ring Size Conversation Chart
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1
2International Ring Size Conversion Chart
Inside Diameter
Inside Diameter
UK & Australia
EU Ring Size
US Ring Size
Ring Size
Equivalent
14mm
F
44
3
14.1mm
F 1/2
44 5/8
3 1/4
14.4mm
G
45 1/4
3 1/2
14.6mm
G 1/2
45 7/8
3 3/4
14.9mm
H
46 1/2
4
15.0mm
I
47 1/8
4 1/4
15.3mm
I 1/2
47 3/4
4 1/2
15.6mm
J
48 3/8
4 3/4
15.8mm
J 1/2
49
5
16.0mm
K
49 5/8
5 1/4
16.1mm
K 1/2
50 1/4
5 1/2
16.3mm
L
50 7/8
5 3/4
16.4mm
L 1/2
51 1/2
6
16.9mm
M
52 1/8
6 1/4
17.0mm
M 1/2
52 3/4
6 1/2
17.1mm
N
53 3/8
6 3/4
17.2mm
N 1/2
54
7
17.5mm
O
54 5/8
7 1/4
17.9mm
O 1/2
55 1/2
7 1/2
18.0mm
P
55 7/8
7 3/4
18.1mm
P 1/2
56 3/4
8
18.3mm
Q
57 1/8
8 1/4
18.6mm
Q 1/2
58
8 1/2
18.9mm
R
58 3/8
8 3/4
19.0mm
R 1/2
59
9
19.1mm
S
59 5/8
9 1/4
1
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