Paper Drafting Sizes - US Architectural Drawings

Commonly used US architectural drawing sizes

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ARCH	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