This is a Table of Arch Series Paper Sizes. This includes Arch A, Arch B, Arch C, Arch D, Arch E1, Arch E or Arch 1, Arch 2, Arch 3, Arch 4, Arch 5, Arch 6. Standard Dimensions or Length and Width of Paper in Arch Series in unit of measurements in mm (millimeter), cm (centimeter), and inch (inches).

There is a corresponding series of paper sizes used for architectural purposes defined in the same standard, ANSI/ASME Y14.1, which is usually abbreviated “Arch”. This series also shares the property that bisecting each size produces two of the size below, with alternating aspect ratios. It may be preferred by North American architects because the aspect ratios (4:3 and 3:2) are ratios of small integers, unlike their ANSI (or ISO) counterparts. Furthermore, the aspect ratio 4:3 matches the traditional aspect ratio for computer displays.

Arch Series Paper Sizes
Sizesmmcminch
Arch AArch 1229 × 30522.9 × 30.59 × 12
Arch BArch 2305 × 45730.5 × 45.712 × 18
Arch CArch 3457 × 61045.7 × 6118 × 24
Arch DArch 4610 × 91461 × 91.424 × 36
Arch E1Arch 5762 × 106776.2 × 106.730 × 42
Arch EArch 6914 × 121991.4 × 121.936 × 48

Note: The size Arch E1 has a different aspect ratio because it derives from adding 6 inches to each side of Arch D or subtracting the same amount from Arch E. An intermediate size between Arch C and D with a long side of 30 inches (760 mm) does not exist.

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