Paper Drafting Sizes - US Architectural Drawings

Commonly used US architectural drawing sizes

US Architects Standard Size
(mm) (inches)
ARCH A 228.6 x 304.8 9 x 12
ARCH B 304.8 x 457.2 12 x 18
ARCH C 457.2 x 609.6 18 x 24
ARCH D 609.6 x 914.4 24 x 36
ARCH E 914.4 x 1219.2 36 x 48

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