Paper Sizes

There are two main paper size standards in use around the world: the international (ISO) A series and the North American ANSI sizes. North American architects typically use the ARCH sizes for their large format drawings.

North American Loose Paper Sizes

Size	inches	millimeters
Letter	8.5 × 11	216 × 279
Legal	8.5 × 14	216 × 356
Tabloid	11 × 17	279 × 432
Ledger	17 × 11	432 × 279

North American ANSI Series Paper Sizes

Size	inches	millimeters
ANSI A	8.5 × 11	216 × 279
ANSI B	11 × 17	279 × 432
ANSI C	17 × 22	432 × 559
ANSI D	22 × 34	559 × 864
ANSI E	34 × 44	864 × 1118

North American ARCH Series Paper Size

Size	inches	millimeters
ARCH A	9 x 12	229 × 305
ARCH B	12 x 18	305 × 457
ARCH C	18 x 24	457 × 610
ARCH D	24 x 36	610 × 914
ARCH E	36 x 48	914 × 1219
ARCH E1	30 x 42	762 × 1067

International ISO 216 A-Series Paper Sizes

Size	inches	millimeters
A0	33.1 × 46.8	841 × 1189
A1	23.4 × 33.1	594 × 841
A2	16.5 × 23.4	420 × 594
A3	11.7 × 16.5	297 × 420
A4	8.3 × 11.7	210 × 297
A5	5.8 × 8.3	148 × 210
A6	4.1 × 5.8	105 × 148
A7	2.9 × 4.1	74 × 105
A8	2.0 × 2.9	52 × 74
A9	1.5 × 2.0	37 × 52
A10	1.0 × 1.5	26 × 37

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