Engineering-drawing-sizes meaning

Following are the paper sizes for illustrations throughout the world. The ANSI standards are used in North America, while the ISO specifications are employed elsewhere. For more details about the ISO paper sizes, see A4 paper.ANSI Designations (North America)Width Height Aspect(inches) Ratio ** A 8.5 11 1.294 B 11 17 1.545 C 17 22 1.294 D 22 34 1.545 E 34 44 1.294 ISO DesignationsWidth Height Width Height(inches) (mm) A0 33.1 46.8 841 1189 A1 33.1 23.4 841 594 A2 16.5 23.4 420 594 A3 16.5 11.7 420 297 ** A4 8.3 11.7 210 297 A5 8.3 5.8 210 148 A6 4.1 5.8 105 148 A7 4.1 2.9 105 75 A8 2.0 2.9 52 75 B0 33.1 55.7 1000 1414 B1 33.1 27.8 1000 707 B2 19.7 27.8 500 707 B3 19.7 13.9 500 353 B4 9.8 13.9 250 353 B5 9.8 6.9 250 176 B6 4.9 6.9 125 176 B7 4.9 3.3 125 83 B8 2.4 3.3 62 83 ** letter size (see A4 paper) A 8.5 11 216 279 A4 8.3 11.7 210 297
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