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Use this chart to convert your local standard sizes to your US ring sizes for ordering. Choose your nearest US size. Select the US size that is nearest to yours in the dropdown menus on the product pages. Please contact us at customerservice@darasdiamonds.com if you need assistance. 

 

U.S. Size
Diameter
in Inches
Diameter
in MM
Metric MM
Equivalent
British
French
German
Japanese
Swiss
0000
.390
9.91
 
-
 
 
 
 
00
.422
10.72
 
-
 
 
 
 
0
.454
11.53
 
-
 
 
 
 
1/2
.474
11.95
 
A
 
 
 
 
3/4
.482
12.18
 
A 1/2
 
 
 
 
1
.487
12.37
38.9
B
 
 
1
 
1 1/4
-
12.60
39.6
B 1/2
 
 
 
 
1 1/2
.503
12.78
40.2
C
 
 
 
 
1 3/4
-
13.00
40.8
C 1/2
 
 
 
 
2
.520
13.21
41.5
D
41 1/2
13 1/2
2
1 1/2
2 1/4
-
13.41
42.1
D 1/2
-
-
 
 
2 1/2
.536
13.61
42.7
E
42 3/4
13 3/4
3
2 3/4
2 3/4
-
13.83
43.4
E 1/2
-
-
 
 
3
.553
14.05
44.0
F
44
14
4
4
3 1/8
-
14.15
44.3
F 1/2
-
-
 
 
3 1/4
-
14.25
44.6
-
-
-
 
 
3 3/8
-
14.36
44.9
G
45 1/4
-
5
5 1/4
3 1/2
.569
14.45
45.2
-
-
14 1/2
 
 
3 5/8
-
14.56
45.6
G 1/2
-
 
6
 
3 3/4
-
14.65
45.9
H
46 1/2
 
 
6 1/2
4
.585
14.86
46.5
H 1/2
-
15
7
 
4 1/4
-
15.04
47.1
I
47 3/4
 
 
7 3/4
4 1/2
.601
15.27
47.8
I 1/2
-
15 1/4
8
 
4 5/8
-
15.40
48.1
J
49
15 1/2
 
9
4 3/4
-
15.53
48.4
-
-
 
 
 
5
.618
15.70
49.0
J 1/2
-
15 3/4
9
 
5 1/8
-
15.80
49.3
K
50
 
 
10
5 1/4
-
15.90
49.6
-
-
 
 
 
5 3/8
-
16.0
50.0
K 1/2
-
 
10
 
5 1/2
.634
16.10
50.3
L
51 3/4
16
 
11 3/4
5 3/4
-
16.30
50.9
-
-
 
 
 
5 7/8
-
16.41
51.3
L 1/2
-
 
 
 
6
.650
16.51
51.5
M
52 3/4
16 1/2
12
12 3/4
6 1/4
-
16.71
52.2
M 1/2
-
 
 
 
6 1/2
.666
16.92
52.8
N
54
17
13
14
6 3/4
-
17.13
53.4
N 1/2
-
 
 
 
7
.683
17.35
54.0
O
55 1/4
17 1/4
14
15 1/4
7 1/4
-
17.45
54.7
O 1/2
-
 
 
 
7 1/2
.699
17.75
55.3
P
56 1/2
17 3/4
15
16 1/2
7 3/4
-
17.97
55.9
P 1/2
-
 
 
 
8
.716
18.19
56.6
Q
57 3/4
18
16
17 3/4
8 1/4
-
18.35
57.2
Q 1/2
-
 
 
 
8 1/2
.732
18.53
57.8
-
-
18 1/2
17
 
8 5/8
-
18.61
58.4
R
59
 
 
19
8 3/4
-
18.69
58.4
-
-
 
 
 
8 7/8
-
18.80
59.0
R 1/2
-
 
 
 
9
.748
18.89
59.1
-
-
19
18
 
9 1/8
-
19.10
59.4
S
60 1/4
 
 
20 1/4
9 1/4
-
19.22
59.7
-
-
 
 
 
9 3/8
-
19.31
60.0
S 1/2
-
 
 
 
9 1/2
.764
19.41
60.3
-
-
19 1/2
19
 
9 5/8
-
19.51
60.6
T
61 1/2
 
 
21 1/2
9 3/4
-
19.62
60.9
-
-
 
 
 
10
.781
19.84
61.6
T 1/2
-
20
20
 
10 1/4
-
20.02
62.2
U
62 3/4
 
21
22 3/4
10 1/2
.797
20.20
62.8
U 1/2
-
20 1/4
22
 
10 5/8
-
20.32
63.1
V
63
 
 
23 3/4
10 3/4
-
20.44
63.5
-
-
 
 
 
11
.814
20.68
64.1
V 1/2
-
20 3/4
23
 
11 1/8
-
20.76
64.3
W
65
 
 
25
11 1/4
-
20.85
64.7
-
-
 
 
 
11 3/8
-
20.94
65.0
W 1/2
-
 
 
 
11 1/2
-
21.08
65.3
-
-
21
24
 
11 5/8
.830
21.18
65.7
X
66 1/4
 
 
26 1/4
11 3/4
-
21.24
66.0
-
-
 
 
 
11 7/8
-
21.30
66.3
X 1/2
-
 
 
 
12
.846
21.49
66.6
Y
67 1/2
21 1/4
25
27 1/2
12 1/4
-
21.69
67.2
Y 1/2
-
 
 
 
12 1/2
.862
21.89
67.9
Z
68 3/4
21 3/4
26
28 3/4
12 3/4
-
22.10
68.5
Z 1/2
-