engineering drawing sizes

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 Designations
Width  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