Ring Size Chart
www.2bjewelled.com
Sizes
Internal diameter
Internal circumference
UK, Ireland,
Australia
France
Germany
Swiss
USA &
Canada
Japan
inches
mm
inches
mm
-
-
-
-
0
-
0.458
11.63
1.44
36.5
-
-
-
-
1/4
-
0.466
11.84
1.46
37.2
A
-
-
-
1/2
-
0.474
12.04
1.49
37.8
A 1/2
-
-
-
3/4
-
0.482
12.24
1.51
38.5
B
-
-
-
1
1
0.490
12.45
1.54
39.1
B 1/2
-
-
-
1 1/4
-
0.498
12.65
1.56
39.7
C
-
-
-
1 1/2
-
0.506
12.85
1.59
40.4
C 1/2
-
-
-
1 3/4
-
0.514
13.06
1.61
41.0
D
41 1/2
13 1/2
1.5
2
2
0.522
13.26
1.64
41.7
D 1/2
-
-
-
2 1/4
-
0.530
13.46
1.67
42.3
E
42 3/4
13 3/4
2 3/4
2 1/2
3
0.538
13.67
1.69
42.9
E 1/2
-
-
-
2 3/4
-
0.546
13.87
1.72
43.6
F
44
14
4
3
4
0.554
14.07
1.74
44.2
F 1/2
-
-
5 1/4
3 1/4
5
0.562
14.27
1.77
44.8
G
45 1/4
-
-
3 3/8
-
0.565
14.36
1.78
44.9
G 1/2
-
14 1/2
6 1/2
3 5/8
6
0.573
14.56
1.80
45.6
H
46 1/2
-
-
3 3/4
-
0.577
14.65
1.81
45.9
H 1/2
-
15
-
4
7
0.585
14.86
1.84
46.5
I
47 3/4
-
7 3/4
4 1/4
-
0.592
15.04
1.86
47.1
I 1/2
-
15 1/4
-
4 1/2
8
0.601
15.27
1.89
47.8
J
49
15 1/2
9
4 5/8
-
0.610
15.49
1.92
48.7
J 1/2
-
15 3/4
-
5
9
0.618
15.70
1.94
49.3
K
50
-
10
5 1/8
-
0.622
15.80
1.94
49.3
K 1/2
-
-
-
5 3/8
10
0.630
16.00
1.97
50.0
L
51 3/4
16
11 3/4
5 1/2
-
0.634
16.10
1.98
50.3
L 1/2
-
-
-
5 7/8
11
0.646
16.41
2.02
51.3
M
52 3/4
16 1/2
12 3/4
6
12
0.650
16.51
2.04
51.8
M 1/2
-
-
-
6 1/4
-
0.658
16.71
2.06
52.2
N
54
17
14
6 1/2
13
0.666
16.92
2.08
52.8
N 1/2
-
-
-
6 3/4
-
0.682
17.32
2.14
54.4
O
55 1/4
17 1/4
15 1/4
7
14
0.69
17.53
2.17
55.1
O 1/2
-
-
-
7 1/4
-
0.698
17.73
2.19
55.7
P
56 1/2
17 3/4
16 1/2
7 1/2
15
0.706
17.93
2.22
56.3
P 1/2
-
-
-
7 3/4
-
0.714
18.14
2.24
57.0
Q
57 3/4
18
17 3/4
8
16
0.722
18.34
2.27
57.6
Q 1/2
-
-
-
8 1/4
-
0.730
18.54
2.29
58.25
R
59
18 1/2
19
8 5/8
17
0.738
18.75
2.32
58.9
R 1/2
-
19
-
8 7/8
18
0.746
18.95
2.34
59.5
S
60 1/4
-
20 1/4
9 1/8
-
0.752
19.10
2.36
60.0
S 1/2
-
-
19 1/2
9 3/8
19
0.760
19.31
2.39
60.6
T
61 1/2-
-
21 1/2
9 5/8
-
0.768
19.51
2.41
61.3
T 1/2
-
20
-
10
20
0.781
19.84
2.45
62.3
U
62 3/4
-
22 3/4
10 1/4
21
0.788
20.02
2.47
62.9
U 1/2
-
20 1/4
-
10 1/2
22
0.794
20.17
2.49
63.4
V
63
-
23 3/4
10 5/8
-
0.800
20.32
2.51
63.8
V 1/2
-
20 3/4
-
11
23
0.814
20.68
2.56
65.0
W
65
-
25
11 1/8
-
0.818
20.78
2.57
65.3
W 1/2
-
21
-
11 3/8
24
0.824
20.94
2.59
65.8
X
66 1/4
-
26 1/4
11 5/8
-
0.834
21.18
2.62
66.6
X 1/2
-
-
-
11 7/8
-
0.839
21.30
2.63
66.9
Y
67 1/2
21 1/4
27 1/2
12
25
0.846
21.49
2.66
67.5
Z
68 3/4
21 3/4
28 3/4
12 1/2
26
0.862
21.89
2.71
68.8
Z 1/2
-
-
-
12 3/4
-
0.870
22.10
2.73
69.4
-
-
22
-
13
27
0.879
22.33
2.76
70.1
Z1
-
-
-
13 1/4
-
0.882
22.40
2.77
70.4
-
-
-
-
13 1/2
-
0.890
22.61
2.80
71.0
Z2
-
-
-
13 3/4
-
0.898
22.81
2.82
71.7
Z3
-
-
-
14
-
0.906
23.01
2.85
72.3
Z4
-
-
-
14 1/2
-
0.922
23.42
2.90
73.6
-
-
-
-
15
-
0.938
23.83
2.95
74.8
-
-
-
-
15 1/2
-
0.954
24.23
3.00
76.1
-
-
-
-
16
-
0.970
24.64
3.05
77.4
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