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Arch B

12 x 18 inch
/
304.8 x 457.2 mm

The Arch B paper size measures 12 inches wide by 18 inches tall, giving it a surface area of 216 square inches. Arch B is the second size up in the architectural series defined by ANSI. Its 3:2 aspect ratio makes Arch B similar in shape to the ANSI B/Ledger size. The 12x18 dimensions provide ample drawing space for more detailed architectural plans and component drawings. Common uses for Arch B include detailed floor plans, expanded architectural sketches, and orthographic multi-view drawings. Its elongated shape allows more room for height on perspective interior views and exterior elevations. Arch B scales up directly from Arch A the same way ANSI B scales from ANSI A. The 12x18 size can accommodate two Arch A sheets side-by-side. Arch B offers a good balance of portability and drawing area for many architectural applications.

All US Paper Sizes
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Letter
in
8.5 x 11
Legal
in
8.5 x 14
Tabloid
in
11 x 17
Ledger
in
17 x 11
Executive
in
7.3 x 10.5
Half Letter
in
5.5 x 8.5
Statement
in
5.5 x 8.5
Junior Legal
in
5 x 8
Government Letter
in
8 x 10
Government Legal
in
8.5 x 13
ANSI A
in
8.5 x 11
ANSI B
in
11 x 17
ANSI C
in
17 x 22
ANSI D
in
22 x 34
ANSI E
in
34 x 44
Arch A
in
9 x 12
Arch B
in
12 x 18
Arch C
in
18 x 24
Arch D
in
24 x 36
Arch E
in
36 x 48
Arch E1
in
30 x 42
Arch E2
in
26 x 38
Arch E3
in
27 x 39
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