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Ring Size Conversion Chart

US - Canada Britain - Ireland
Australia
Japan Switzerland
1/2 A ... ...
3/4 A 1/2 ... ...
1 B 1 ...
1 1/4 B 1/2 ... ...
1 1/2 C ... ...
1 3/4 C 1/2 ... ...
2 D 2 1.5
2 1/4 D 1/2 ... ...
2 1/2 E 3 2.75
2 3/4 E 1/2 ... ...
3 F 4 4
3 1/4 F 1/2 5 5.25
3 1/2 G ... ...
3 3/4 G 1/2 6 6.5
4 H 7 ...
4 1/4 H 1/2 ... 7.75
4 1/2 I 8 ...
4 3/4 J ... 9
5 J 1/2 9 ...
5 1/4 K ... 10
5 1/2 K 1/2 10 ...
5 3/4 L ... 11.75
6 L 1/2 11 12.75
6 1/4 M 12 ...
6 1/2 M 1/2 13 14
6 3/4 N ... ...
7 N 1/2 14 15.25
7 1/4 O ... ...
7 1/2 O 1/2 15 16.5
7 3/4 P ... ...
8 P 1/2 16 17.75
8 1/4 Q ... ...
8 1/2 Q 1/2 17 ...
8 3/4 R ... 19
9 R 1/2 18 ...
9 1/4 S ... 20.25
9 1/2 S 1/2 19 ...
9 3/4 T ... 21.5
10 T 1/2 20 ...
10 1/4 U 21 ...
10 1/2 U 1/2 22 22.75
10 3/4 V ... ...
11 V 1/2 23 ...
11 1/4 W ... 25
11 1/2 W 1/2 24 ...
11 3/4 X ... ...
12 X 1/2 25 27.5
12 1/4 Y ... ...
12 1/2 Z 26 28.75
12 3/4 Z 1/2 ... ...
13 ... 27 ...
13 1/4 Z1 ... ...
13 1/2 ... ... ...
13 3/4 Z2 ... ...
14 Z3 ... ...
14 1/4 ... ... ...
14 1/2 Z4 ... ...
14 3/4 ... ... ...
15 ... ... ...
15 1/4 ... ... ...
15 1/2 ... ... ...
15 3/4 ... ... ...
16 ... ... ...

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