American 0000 00 0 1/2 3/4 1 1 1/4 1 1/2 1 3/4 2 2 1/4 2 1/2 2 3/4 3 3 1/8 3 1/4 3 3/8 3 1/2 3 5/8 3 3/4 4 4 1/4 4 1/2 4 5/8 4 3/4 5 5 1/8 5 1/4 5 3/8 5 1/2 5 3/4 5 7/8 6 6 1/4 6 1/2 6 3/4 7 7 1/4 7 1/2 7 3/4 8 8 1/4 8 1/2 8 5/8 8 3/4 8 7/8 9 9 1/8 9 1/4 9 3/8 9 1/2 9 5/8 9 3/4 10 10 1/4 10 1/2 10 5/8 10 3/4 11 11 1/8 11 1/4 11 3/8 11 1/2 11 5/8 11 3/4 11 7/8 12 12 1/2 12 3/4 13 ********** British --- (1) --- (2) --- (3) A A 1/2 B B 1/2 C C 1/2 D D 1/2 E E 1/2 F F 1/2 --- (4) G --- (5) G 1/2 H H 1/2 I I 1/2 J --- (6) J 1/2 K --- (7) K 1/2 L --- (8) L 1/2 M M 1/2 N N 1/2 O O 1/2 P P 1/2 Q Q 1/2 --- (9) R --- (10) R 1/2 --- (11) S --- (12) S 1/2 --- (13) T --- (15) T 1/2 U U 1/2 V --- (15) V 1/2 W --- (16) W 1/2 --- (17) X --- (18) X 1/2 Y Z Z 1/2 --- (19) ********** French --- --- --- --- --- --- --- --- --- 41 1/2 --- 42 3/4 --- 44 --- --- 45 1/4 --- --- 46 1/2 --- 47 3/4 --- 49 --- --- 50 --- --- 51 3/4 --- --- 52 3/4 --- 54 --- 55 1/4 --- 56 1/2 --- 57 3/4 --- --- 59 --- --- --- 60 1/4 --- --- --- 61 1/2 --- --- 62 3/4 --- 63 --- --- 65 --- --- --- 66 1/4 --- --- 67 1/2 68 3/4 --- --- ********** German --- --- --- --- --- --- --- --- --- 13 1/2 --- 13 3/4 --- 14 --- --- --- 14 1/2 --- --- 15 --- 15 1/4 15 1/2 --- 15 3/4 --- --- --- 16 --- --- 16 1/2 --- 17 --- 17 1/4 --- 17 3/4 --- 18 --- 18 1/2 --- --- --- 19 --- --- --- 19 1/2 --- --- 20 --- 20 1/4 --- --- 20 3/4 --- --- --- 21 --- --- --- 21 1/4 21 3/4 --- 22 ********** Japanese --- --- --- --- --- 1 --- --- --- 2 --- 3 --- 4 --- --- 5 --- 6 --- 7 --- 8 --- --- 9 --- --- 10 --- --- --- 12 --- 13 --- 14 --- 15 --- 16 --- 17 --- --- --- 18 --- --- --- 19 --- --- 20 21 22 --- --- 23 --- --- --- 24 --- --- --- 25 26 --- 27 ********** Swiss --- --- --- --- --- --- --- --- --- 1 1/2 --- 2 3/4 --- 4 --- --- 5 1/4 --- --- 6 1/2 --- 7 3/4 --- 9 --- --- 10 --- --- 11 3/4 --- --- 12 3/4 --- 14 --- 15 1/4 --- 16 1/2 --- 17 3/4 --- --- 19 --- --- --- 20 1/4 --- --- --- 21 1/2 --- --- 22 3/4 --- 23 3/4 --- --- 25 --- --- --- 26 1/4 --- --- 27 1/2 28 3/4 --- --- ********** Circumference --- --- --- --- --- 38.9 39.6 40.2 40.8 41.5 42.1 42.7 43.4 44.0 44.3 44.6 44.9 45.2 45.6 45.9 46.5 47.1 47.8 48.1 48.4 49.0 49.3 49.6 50.0 50.3 50.9 51.3 51.5 52.2 52.8 53.4 54.0 54.7 55.3 55.9 56.6 57.2 57.8 58.4 58.4 59.0 59.1 59.4 59.7 60.0 60.3 60.6 60.9 61.6 62.2 62.8 63.1 63.5 64.1 64.3 64.7 65.0 65.3 65.7 66.0 66.3 66.6 67.9 68.5 69.1 ********** Diameter 9.91 10.72 11.53 11.95 12.18 12.37 12.60 12.78 13.00 13.21 13.41 13.61 13.83 14.05 14.15 14.25 14.36 14.45 14.56 14.65 14.86 15.04 15.27 15.40 15.53 15.70 15.80 15.90 16.0 16.10 16.30 16.41 16.51 16.71 16.92 17.13 17.35 17.45 17.75 17.97 18.19 18.35 18.53 18.61 18.69 18.80 18.89 19.10 19.22 19.31 19.41 19.51 19.62 19.84 20.02 20.20 20.32 20.44 20.68 20.76 20.85 20.94 21.08 21.18 21.24 21.30 21.49 21.89 22.10 22.33 ********** Diameter .390 .422 .454 .474 .482 .487 --- .503 --- .520 --- .536 --- .553 --- --- --- .569 --- --- .585 --- .601 --- --- .618 --- --- --- .634 --- --- .650 --- .666 --- .683 --- .699 --- .716 --- .732 --- --- --- .748 --- --- --- .764 --- --- .781 --- .797 --- --- .814 --- --- --- --- .830 --- --- .846 .862 --- .879 **********
