North American Architectural Sizes Chart
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1North American Architectural Sizes
In addition to the North American ANSI system, there is a corresponding series of paper sizes used for
architectural purposes. This series of paper sizes is preferred by North American architects because the
aspect ratios (4:3 and 3:2) are ratios of small integers, unlike their ANSI or ISO standard counterparts.
Portrait
Size
Width (mm)
Height (mm)
Width (in)
Height (in)
Arch E
914
1219
36.0
48.0
Arch E1
762
1067
30.0
42.0
Arch D
610
914
24.0
36.0
Arch C
457
610
18.0
24.0
Arch B
305
457
12.0
18.0
Arch A
229
305
9.0
12.0
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