RING SIZE CONVERSION
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US, CANADA
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UK, AUSTRALIA, IRELAND, NEW ZEALAND
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JAPAN, INDIA, CHINA, SOUTH AFRICA
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SPAIN, ITALY, NETHERLANDS, SWITZERLAND
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INSIDE DIAMETER & CIRCUMFERENCE(MM)
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4
|
H
|
7
|
6.75
|
14.88 & 46.8
|
4.25
|
H1/2
|
7.5
|
15.09 & 47.4
|
|
4.5
|
I
|
8
|
8
|
15.29 & 48
|
4.75
|
J
|
8.75
|
15.49 & 48.7
|
|
5
|
J1/2
|
9
|
9.25
|
15.7 & 49.3
|
5.25
|
K
|
10
|
15.9 & 50
|
|
5.5
|
K1/2
|
10
|
10.5
|
16.1 & 50.6
|
5.75
|
L
|
11.25
|
16.31 & 51.2
|
|
6
|
L1/2
|
11
|
11.75
|
16.51 & 51.9
|
6.25
|
M
|
12
|
12.5
|
16.71 & 52.5
|
6.5
|
M1/2
|
13
|
13.25
|
16.92 & 53.1
|
6.75
|
N
|
13.75
|
17.12 & 53.8
|
|
7
|
N1/2
|
14
|
14.5
|
17.32 & 54.4
|
7.25
|
O
|
15
|
17.53 & 55.1
|
|
7.5
|
O1/2
|
15
|
15.75
|
17.73 & 55.7
|
7.75
|
P
|
16.25
|
17.93 & 56.3
|
|
8
|
P1/2
|
16
|
17
|
18.14 & 57
|
8.25
|
Q
|
17.5
|
18.34 & 57.6
|
|
8.5
|
Q1/2
|
17
|
18.25
|
18.54 & 58.3
|
8.75
|
R
|
19
|
18.75 & 58.9
|
|
9
|
R1/2
|
18
|
19.5
|
18.95 & 59.5
|
9.25
|
S
|
20.25
|
19.15 & 60.2
|
|
9.5
|
S1/2
|
19
|
20.75
|
19.35 & 60.8
|
9.75
|
T
|
21.5
|
19.56 & 61.4
|
|
10
|
T1/2
|
20
|
22
|
19.76 & 62.1
|
10.25
|
U
|
21
|
22.75
|
19.96 & 62.7
|
10.5
|
U1/2
|
22
|
23.25
|
20.17 & 63.4
|
10.75
|
V
|
24
|
20.37 & 64
|
|
11
|
V1/2
|
23
|
24.75
|
20.57 & 64.6
|
11.25
|
W
|
25.25
|
20.78 & 65.3
|
|
11.5
|
W1/2
|
24
|
26
|
20.98 & 65.9
|
11.75
|
X
|
26.5
|
21.18 & 66.6
|
|
12
|
X1/2
|
25
|
27.25
|
21.39 & 67.2
|
12.25
|
Y
|
27.75
|
21.59 & 67.8
|
|
12.5
|
Z
|
26
|
28.5
|
21.79 & 68.5
|
12.75
|
Z1/2
|
29
|
22 & 69.1
|
|
13
|
27
|
29.75
|
22.2 & 69.7
|
|
13.25
|
Z1
|
30.5
|
22.4 & 70.4
|
|
13.5
|
31
|
22.61 & 71
|
||
13.75
|
Z2
|
31.75
|
22.81 & 71.7
|
|
14
|
Z3
|
32.25
|
23.01 & 72.3
|
|
14.25
|
33
|
23.22 & 72.9
|
||
14.5
|
Z4
|
33.5
|
23.42 & 73.6
|
|
14.75
|
34.25
|
23.62 & 74.2
|
||
15
|
34.75
|
23.82 & 74.7
|
||
15.25
|
35.5
|
24.03 & 75.5
|
||
15.5
|
36.25
|
24.23 & 76.1
|
||
15.75
|
36.75
|
24.43 & 76.8
|
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16
|
37.5
|
24.64 & 77.4
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