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INTERNATIONAL RING SIZES

CONVERT INTERNATIONAL RING SIZES

The chart below is intended for use as a guide only:

 

France
(circum mm)

 Diameter (Inches) UK America and
Canada		 Germany Japan Switzerland
- 0.390 - 000 - - -
- 0.422 - 00 - - -
- 0.454 - 0 - - -
- 0.462 A ½ - - -
- 0.471 A 1/2 ¾ - - -
- 0.487 B 1 - 1 -
- 0.495 B 1/2 1 1/4 - - -
- 0.503 C 1 1/2 - - -
- 0.511 C 1/2 1 3/4 - - -
41 1/2 0.520 D 2 13 1/4 2 1 1/2
42 1/8 0.528 D 1/2 2 1/4 13 1/2 - -
42 3/4 0.536 E 2 1/2 13 3/4 3 2 3/4
43 3/8 0.544 E 1/2 2 3/4 - - 3 3/8
44 0.553 F 3 14 4 4
44 5/8 0.561 F 1/2 3 1/4 14 1/4 - 4 5/8
45 1/4 0.569 G 3 1/2 14 1/2 5 5 1/4
45 7/8 0.577 G 1/2 3 3/4 14 3/4 6 5 7/8
46 1/2 0.586 H 4 15 7 6 1/2
47 1/8 0.594 H 1/2 4 1/4 15 1/4 - 7 1/8
47 3/4 0.602 I 4 1/2 15 1/2 8 7 3/4
48 3/8 0.610   4 3/4 - - 8 3/8
49 0.619   5 15 3/4 9 9
49 5/8 0.627   5 1/4 16 - 9 5/8
50 1/4 0.635   5 1/2 16 1/4 10 10 1/4
50 7/8 0.643   5 3/4 - 11 10 7/8
51 1/2 0.652   6 16 1/2 12 11 1/2
52 1/8 0.660   6 1/4 16 3/4 - 12 1/8
52 3/4 0.668   6 1/2 17 13 12 3/4
53 3/8 0.676   6 3/4 - - 13 3/8
54 0.685   7 17 1/4 14 14
54 5/8 0.693   7 1/4 17 1/2 - 14 5/8
55 1/4 0.701   7 1/2 17 3/4 15 15 1/4
55 7/8 0.709   7 3/4 - - 15 7/8
56 1/2 0.717   8 18 16 16 1/2
57 1/8 0.726   8 1/4 18 1/4 - 17 1/8
57 3/4 0.734   8 1/2 18 1/2 17 17 3/4
58 3/8 0.742   8 3/4 18 3/4 - 18 3/8
59 0.750   9 19 18 19
59 5/8 0.759   9 1/4 19 1/4 - 19 5/8
60 1/4 0.767   9 1/2 19 1/2 19 20 1/4
60 7/8 0.775   9 3/4 19 3/4 - 20 7/8
61 1/2 0.783   10 20 20 21 1/2
62 1/8 0.792   10 1/4 20 1/4 21 22 1/8
62 3/4 0.800   10 1/2 20 1/2 22 22 3/4
63 3/8 0.808   10 3/4 - - 23 3/8
64 0.816   11 20 3/4 23 24
64 5/8 0.825   11 1/4 - - 24 5/8
65 1/4 0.833   11 1/2 21 24 25 1/4
65 7/8 0.841   11 3/4 - - 25 7/8
66 1/2 0.849   12 21 1/4 25 26 1/2
67 1/8 0.858   12 1/4 21 1/2 - 27 1/8
67 3/4 0.866   12 1/2 21 3/4 26 27 3/4
68 3/8 0.874   12 3/4 - - 28 3/8
69 0.882   13 22 27 29

 

 

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