SKD RING SIZE | Inside Diameter in millimeters | American Size |
45.24 | 14.40 | 3 1/2 |
45.5 | 14.48 | |
45.75 | 14.56 | 3 3/4 |
46 | 14.64 | |
46.5 | 14.80 | 4 |
47 | 14.96 | 4 1/4 |
47.5 | 15.10 | |
47.73 | 15.20 | 4 1/2 |
48 | 15.30 | |
48.5 | 15.44 | 4 3/4 |
49 | 15.60 | 5 |
49.5 | 15.76 | 5 1/4 |
50 | 15.90 | |
50.24 | 16.00 | 5 1/2 |
50.5 | 16.10 | |
51 | 16.23 | 5 3/4 |
51.5 | 16.39 | 6 |
52 | 16.55 | 6 1/4 |
52.5 | 16.70 | |
52.75 | 16.80 | 6 1/2 |
53 | 16.90 | |
53.5 | 17.03 | 6 3/4 |
54 | 17.19 | 7 |
54.5 | 17.30 | |
54.64 | 17.40 | 7 1/4 |
55 | 17.50 | |
55.26 | 17.60 | 7 1/2 |
55.5 | 17.70 | |
56 | 17.83 | 7 3/4 |
56.5 | 17.99 | 8 |
57 | 18.10 | |
57.15 | 18.20 | 8 1/4 |
57.5 | 18.30 | |
57.78 | 18.40 | 8 1/2 |
58 | 18.50 | |
58.5 | 18.62 | 8 3/4 |
59 | 18.78 | 9 |
59.5 | 18.90 | |
59.66 | 19.00 | 9 1/4 |
60 | 19.10 | |
60.29 | 19.20 | 9 1/2 |
60.5 | 19.30 | |
61 | 19.42 | 9 3/4 |
61.5 | 19.58 | 10 |
62 | 19.70 | |
62.17 | 19.80 | 10 1/4 |
62.8 | 20.00 | 10 1/2 |
63 | 20.05 | |
63.43 | 20.20 | 10 3/4 |
64 | 20.37 | 11 |
64.68 | 20.60 | 11 1/4 |
65 | 20.70 | |
65.3 | 20.80 | 11 1/2 |
66 | 21.01 | 11 3/4 |
66.57 | 21.20 | 12 |
67.2 | 21.40 | 12 1/4 |
67.82 | 21.60 | 12 1/2 |
68.45 | 21.80 | 12 3/4 |
69.1 | 22.00 | 13 |