Ring size chart
RING SIZE CONVERSION CHART
INTERNAL DIAMETER. MM |
US & CANADA |
BRITISH & AUSTRALIA |
RUSSIA & FRANCE |
GERMANY |
JAPAN |
SWISS |
9.91 |
0 |
- |
- |
- |
- |
- |
10.72 |
0 |
- |
- |
- |
- |
- |
11.53 |
0 |
- |
- |
- |
- |
- |
11.95 |
1/2 |
A |
- |
- |
- |
- |
12.18 |
3/4 |
A 1/2 |
- |
- |
- |
- |
12.37 |
1 |
B |
- |
- |
1 |
- |
12.60 |
1 1/4 |
B 1/2 |
- |
- |
- |
- |
12.78 |
1 1/2 |
C |
- |
- |
- |
- |
13.00 |
1 3/4 |
C 1/2 |
- |
- |
- |
- |
13.21 |
2 |
D |
41 1/2 |
13 1/2 |
2 |
1 1/2 |
13.41 |
2 1/4 |
D 1/2 |
- |
- |
- |
- |
13.61 |
2 1/2 |
E |
42 3/4 |
13 3/4 |
3 |
2 3/4 |
13.83 |
2 3/4 |
E 1/2 |
- |
- |
- |
- |
14.05 |
3 |
F |
44 |
14 |
4 |
4 |
14.15 |
3 1/8 |
F 1/2 |
- |
- |
- |
- |
14.25 |
3 1/4 |
F 3/4 |
- |
- |
- |
- |
14.36 |
3 3/8 |
G |
45 1/4 |
- |
5 |
5 1/4 |
14.45 |
3 1/2 |
G 1/4 |
- |
14 1/2 |
- |
- |
14.56 |
3 5/8 |
G 1/2 |
- |
- |
6 |
- |
14.65 |
3 3/4 |
H |
46 1/2 |
- |
- |
6 1/2 |
14.86 |
4 |
H 1/2 |
- |
15 |
7 |
- |
15.04 |
4 1/4 |
I |
47 3/4 |
- |
- |
7 3/4 |
15.27 |
4 1/2 |
I 1/2 |
- |
15 1/4 |
8 |
- |
15.40 |
4 5/8 |
J |
49 |
15 1/2 |
- |
9 |
15.53 |
4 3/4 |
J 1/4 |
- |
- |
- |
- |
15.70 |
5 |
J 1/2 |
- |
15 3/4 |
9 |
- |
15.80 |
5 1/8 |
K |
50 |
- |
- |
10 |
15.90 |
5 1/4 |
K 1/4 |
- |
- |
- |
- |
16.00 |
5 3/8 |
K 1/2 |
- |
- |
10 |
- |
16.10 |
5 1/2 |
L |
51 3/4 |
16 |
- |
11 3/4 |
16.30 |
5 3/4 |
L 1/4 |
- |
- |
- |
- |
16.41 |
5 7/8 |
L 1/2 |
- |
- |
- |
- |
16.51 |
6 |
M |
52 3/4 |
16 1/2 |
12 |
12 3/4 |
16.71 |
6 1/4 |
M 1/2 |
- |
- |
- |
- |
16.92 |
6 1/2 |
N |
54 |
17 |
13 |
14 |
17.13 |
6 3/4 |
N 1/2 |
- |
- |
- |
- |
17.35 |
7 |
O |
55 1/4 |
17 1/4 |
14 |
15 1/4 |
17.45 |
7 1/4 |
O 1/2 |
- |
- |
- |
- |
17.75 |
7 1/2 |
P |
56 1/2 |
17 3/4 |
15 |
16 1/2 |
17.97 |
7 3/4 |
P 1/2 |
- |
- |
- |
- |
18.19 |
8 |
Q |
57 3/4 |
18 |
16 |
17 3/4 |
18.35 |
8 1/4 |
Q 1/2 |
- |
- |
- |
- |
18.53 |
8 1/2 |
Q 3/4 |
- |
18 1/2 |
17 |
- |
18.61 |
8 5/8 |
R |
59 |
- |
- |
19 |
18.69 |
8 3/4 |
R 1/4 |
- |
- |
- |
- |
18.80 |
8 7/8 |
R 1/2 |
- |
- |
- |
- |
18.89 |
9 |
R 3/4 |
- |
19 |
18 |
- |
19.10 |
9 1/8 |
S |
60 1/4 |
- |
- |
20 1/4 |
19.22 |
9 1/4 |
S 1/4 |
- |
- |
- |
- |
19.31 |
9 3/8 |
S 1/2 |
- |
- |
- |
- |
19.41 |
9 1/2 |
S 3/4 |
- |
19 1/2 |
19 |
- |
19.51 |
9 5/8 |
T |
61 1/2 |
- |
- |
21 1/2 |
19.62 |
9 3/4 |
T 1/4 |
- |
- |
- |
- |
19.84 |
10 |
T 1/2 |
- |
20 |
20 |
- |
20.02 |
10 1/4 |
U |
62 3/4 |
- |
21 |
22 3/4 |
20.20 |
10 1/2 |
U 1/2 |
- |
20 1/4 |
22 |
- |
20.32 |
10 5/8 |
V |
63 |
- |
- |
23 3/4 |
20.44 |
10 3/4 |
V 1/4 |
- |
- |
- |
- |
20.68 |
11 |
V 1/2 |
- |
20 3/4 |
23 |
- |
20.76 |
11 1/8 |
W |
65 |
- |
- |
25 |
20.85 |
11 1/4 |
W 1/4 |
- |
- |
- |
- |
20.94 |
11 3/8 |
W 1/2 |
- |
- |
- |
- |
21.08 |
11 1/2 |
W 3/4 |
- |
21 |
24 |
- |
21.18 |
11 5/8 |
X |
66 1/4 |
- |
- |
26 1/4 |
21.24 |
11 3/4 |
X 1/4 |
- |
- |
- |
- |
21.30 |
11 7/8 |
X 1/2 |
- |
- |
- |
- |
21.49 |
12 |
Y |
67 1/2 |
21 1/4 |
25 |
27 1/2 |
21.69 |
12 1/4 |
Y 1/2 |
- |
- |
- |
- |
21.89 |
12 1/2 |
Z |
68 3/4 |
21 3/4 |
26 |
28 3/4 |
22.10 |
12 3/4 |
Z +1/2 |
- |
- |
- |
- |
22.33 |
13 |
Z+1 |
- |
22 |
27 |
- |
22.60 |
13.5 |
Z+1.5 |
- |
- |
- |
- |
22.69 |
- |
Z+2 |
- |
- |
- |
- |
22.92 |
- |
Z+2.5 |
- |
- |
- |
- |
23.06 |
- |
Z+3 |
- |
- |
- |
- |
23.24 |
- |
Z+3.5 |
- |
- |
- |
- |
23.47 |
- |
Z+4 |
- |
- |
- |
- |
23.55 |
- |
Z+4.5 |
- |
- |
- |
- |
23.87 |
- |
Z+5 |
- |
- |
- |
- |
24.27 |
- |
Z+6 |
- |
- |
- |
- |