International Ring Size Conversion Chart - Wartski Page 2
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1
2I N T E R N AT I O N A L R I N G S I Z E C O N V E R S I O N C H A R T
Inside
Inside
Sizes
Diameter
Circumference
British &
US &
French &
MM
Inches
MM
Inches
German
Japanese
Swiss
Australian
Canada
Russian
A
11.95
0.474
37.54
1.49
1/2
-
-
-
-
12.18
0.482
38.26
1.51
A 1/2
3/4
-
-
-
-
12.37
0.487
38.86
1.53
B
1
-
-
1
-
12.60
0.496
39.58
1.56
B 1/2
1 1/4
-
-
-
-
C
12.78
0.503
40.15
1.58
1 1/2
-
-
-
-
C 1/2
13.00
0.512
40.84
1.61
1 3/4
-
-
-
-
D
13.21
0.520
41.50
1.63
2
41 1/2
13 1/2
2
1 1/2
13.41
0.528
42.13
1.66
D 1/2
2 1/4
-
-
-
-
13.61
0.536
42.76
1.68
E
2 1/2
42 3/4
13 3/4
3
2 3/4
13.83
0.544
43.45
1.71
E 1/2
2 3/4
-
-
-
-
F
14.05
0.553
44.14
1.74
3
44
14
4
4
F 1/2
14.15
0.557
44.45
1.75
3 1/8
-
-
-
-
F 3/4
14.25
0.561
44.77
1.76
3 1/4
-
-
-
-
14.36
0.565
45.11
1.77
G
3 3/8
45 1/4
-
5
5 1/4
14.45
0.569
45.40
1.79
G 1/4
3 1/2
-
14 1/2
-
-
14.56
0.573
45.74
1.80
G 1/2
3 5/8
-
-
6
-
H
14.65
0.577
46.02
1.81
3 3/4
46 1/2
-
-
6 1/2
H 1/2
14.86
0.585
46.68
1.84
4
-
15
7
-
I
15.04
0.592
47.25
1.86
4 1/4
47 3/4
-
-
7 3/4
15.27
0.601
47.97
1.89
I 1/2
4 1/2
-
15 1/4
8
-
15.40
0.606
48.38
1.90
J
4 5/8
49
15 1/2
-
9
15.53
0.611
48.79
1.92
J 1/4
4 3/4
-
-
-
-
J 1/2
15.70
0.618
49.32
1.94
5
-
15 3/4
9
-
K
15.80
0.622
49.64
1.95
5 1/8
50
-
-
10
K 1/4
15.90
0.626
49.95
1.97
5 1/4
-
-
-
-
16.00
0.630
50.27
1.98
K 1/2
5 3/8
-
-
10
-
16.10
0.634
50.58
1.99
L
5 1/2
51 3/4
16
-
11 3/4
16.30
0.642
51.21
2.02
L 1/4
5 3/4
-
-
-
-
L 1/2
16.41
0.646
51.55
2.03
5 7/8
-
-
-
-
M
16.51
0.650
51.87
2.04
6
52 3/4
16 1/2
12
12 3/4
M 1/2
16.71
0.658
52.50
2.07
6 1/4
-
-
-
-
16.92
0.666
53.16
2.09
N
6 1/2
54
17
13
14
17.13
0.674
53.82
2.12
N 1/2
6 3/4
-
-
-
-
17.35
0.683
54.51
2.15
O
7
55 1/4
17 1/4
14
15 1/4
O 1/2
17.45
0.687
54.82
2.16
7 1/4
-
-
-
-
P
17.75
0.699
55.76
2.20
7 1/2
56 1/2
17 3/4
15
16 1/2
P 1/2
17.97
0.707
56.45
2.22
7 3/4
-
-
-
-
18.19
0.716
57.15
2.25
Q
8
57 3/4
18
16
17 3/4
18.35
0.722
57.65
2.27
Q 1/2
8 1/4
-
-
-
-
18.53
0.729
58.21
2.29
Q 3/4
8 1/2
-
18 1/2
17
-
R
18.61
0.733
58.47
2.30
8 5/8
59
-
-
19
R 1/4
18.69
0.736
58.72
2.31
8 3/4
-
-
-
-
R 1/2
18.80
0.740
59.06
2.32
8 7/8
-
-
-
-
18.89
0.748
59.34
2.35
R 3/4
9
-
19
18
-
19.10
0.752
60.00
2.36
S
9 1/8
60 1/4
-
-
20 1/4
19.22
0.757
60.38
2.38
S 1/4
9 1/4
-
-
-
-
S 1/2
19.31
0.760
60.66
2.39
9 3/8
-
-
-
-
S 3/4
19.41
0.764
60.98
2.40
9 1/2
-
19 1/2
19
-
T
19.51
0.768
61.29
2.41
9 5/8
61 1/2
-
-
21 1/2
19.62
0.772
61.64
2.43
T 1/4
9 3/4
-
-
-
-
19.84
0.781
62.33
2.45
T 1/2
10
-
20
20
-
20.02
0.788
62.89
2.48
U
10 1/4
62 3/4
-
21
22 3/4
U 1/2
20.20
0.797
63.46
2.50
10 1/2
-
20 1/4
22
-
V
20.32
0.800
63.84
2.51
10 5/8
63
-
-
23 3/4
V 1/4
20.44
0.805
64.21
2.53
10 3/4
-
-
-
-
20.68
0.814
64.97
2.56
V 1/2
11
-
20 3/4
23
-
20.76
0.817
65.22
2.57
W
11 1/8
65
-
-
25
20.85
0.821
65.50
2.58
W 1/4
11 1/4
-
-
-
-
W 1/2
20.94
0.824
65.78
2.59
11 3/8
-
-
-
-
W 3/4
21.08
0.830
66.22
2.61
11 1/2
-
21
24
-
X
21.18
0.834
66.54
2.62
11 5/8
66 1/4
-
-
26 1/4
21.24
0.836
66.73
2.63
X 1/4
11 3/4
-
-
-
-
21.30
0.839
66.92
2.64
X 1/2
11 7/8
-
-
-
-
21.49
0.846
67.51
2.66
Y
12
67 1/2
21 1/4
25
27 1/2
Y 1/2
21.69
0.854
68.14
2.68
12 1/4
-
-
-
-
Z
21.89
0.862
68.77
2.71
12 1/2
68 3/4
21 3/4
26
28 3/4
Z +1/2
22.10
0.870
69.43
2.73
12 3/4
-
-
-
-
22.33
0.879
70.15
2.76
Z+1
13
-
22
27
-
w w w. w a r t s k i . c o m
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