Inside Diameter  Inside Circumference Sizes
MM Inches MM Inches  US & Canada
9.91 0.390 31.13 1.22 0000
10.72 0.442 33.68 1.39 00
11.53 0.454 36.22 1.43 0
11.95 0.474 37.54 1.49 1/2
12.18 0.482 38.26 1.51 3/4
12.37 0.487 38.86 1.53 1
12.60 0.496 39.58 1.56 1 1/4
12.78 0.503 40.15 1.58 1 1/2
13.00 0.512 40.84 1.61 1 3/4
13.21 0.520 41.50 1.63 2
13.41 0.528 42.13 1.66 2 1/4
13.61 0.536 42.76 1.68 2 1/2
13.83 0.544 43.45 1.71 2 3/4
14.05 0.553 44.14 1.74 3
14.15 0.557 44.45 1.75 3 1/8
14.25 0.561 44.77 1.76 3 1/4
14.36 0.565 45.11 1.77 3 3/8
14.45 0.569 45.40 1.79 3 1/2
14.56 0.573 45.74 1.80 3 5/8
14.65 0.577 46.02 1.81 3 3/4
14.86 0.585 46.68 1.84 4
15.04 0.592 47.25 1.86 4 1/4
15.27 0.601 47.97 1.89 4 1/2
15.40 0.606 48.38 1.90 4 5/8
15.53 0.611 48.79 1.92 4 3/4
15.70 0.618 49.32 1.94 5
15.80 0.622 49.64 1.95 5 1/8
15.90 0.626 49.95 1.97 5 1/4
16.00 0.630 50.27 1.98 5 3/8
16.10 0.634 50.58 1.99 5 1/2
16.30 0.642 51.21 2.02 5 3/4
16.41 0.646 51.55 2.03 5 7/8
16.51 0.650 51.87 2.04 6
16.71 0.658 52.50 2.07 6 1/4
16.92 0.666 53.16 2.09 6 1/2
17.13 0.674 53.82 2.12 6 3/4
17.35 0.683 54.51 2.15 7
17.45 0.687 54.82 2.16 7 1/4
17.75 0.699 55.76 2.20 7 1/2
17.97 0.707 56.45 2.22 7 3/4
18.19 0.716 57.15 2.25 8
18.35 0.722 57.65 2.27 8 1/4
18.53 0.729 58.21 2.29 8 1/2
18.61 0.733 58.47 2.30 8 5/8
18.69 0.736 58.72 2.31 8 3/4
18.80 0.740 59.06 2.32 8 7/8
18.89 0.748 59.34 2.35 9
19.10 0.752 60.00 2.36 9 1/8
19.22 0.757 60.38 2.38 9 1/4
19.31 0.760 60.66 2.39 9 3/8
19.41 0.764 60.98 2.40 9 1/2
19.51 0.768 61.29 2.41 9 5/8
19.62 0.772 61.64 2.43 9 3/4
19.84 0.781 62.33 2.45 10
20.02 0.788 62.89 2.48 10 1/4
20.20 0.797 63.46 2.50 10 1/2
20.32 0.800 63.84 2.51 10 5/8
20.44 0.805 64.21 2.53 10 3/4
20.68 0.814 64.97 2.56 11
20.76 0.817 65.22 2.57 11 1/8
20.85 0.821 65.50 2.58 11 1/4
20.94 0.824 65.78 2.59 11 3/8
21.08 0.830 66.22 2.61 11 1/2
21.18 0.834 66.54 2.62 11 5/8
21.24 0.836 66.73 2.63 11 3/4
21.30 0.839 66.92 2.64 11 7/8
21.49 0.846 67.51 2.66 12
21.69 0.854 68.14 2.68 12 1/4
21.89 0.862 68.77 2.71 12 1/2
22.10 0.870 69.43 2.73 12 3/4
22.33 0.879 70.15 2.76 13
22.60 0.890 71.00 2.80 13.5
22.69 0.893 71.28 2.81 -
22.92 0.902 72.00 2.83 -
23.06 0.908 72.45 2.85 -
23.24 0.915 73.01 2.87 -
23.47 0.924 73.73 2.90 -
23.55 0.927 73.98 2.91 -
23.87 0.940 74.99 2.95 -
24.27 0.956 76.25 3.00 -