Paper size series
Architectural (Arch) sizes: Dimensions Chart
Sizes used by architects in North America. All Arch sizes share a 4:3 or 3:2 ratio, which suits building drawings.
Sizes to scale
| Size | Millimetres | Inches | Pixels @ 300 dpi | Typical use |
|---|---|---|---|---|
| Arch A | 228.6 x 304.8 mm | 9 x 12 in | 2,700 x 3,600 | Architectural drawings and blueprints. |
| Arch B | 304.8 x 457.2 mm | 12 x 18 in | 3,600 x 5,400 | Architectural drawings and blueprints. |
| Arch C | 457.2 x 609.6 mm | 18 x 24 in | 5,400 x 7,200 | Architectural drawings and blueprints. Also a popular poster size. |
| Arch D | 609.6 x 914.4 mm | 24 x 36 in | 7,200 x 10,800 | Architectural drawings and blueprints. Also a popular poster size. |
| Arch E | 914.4 x 1219.2 mm | 36 x 48 in | 10,800 x 14,400 | Architectural drawings and blueprints. |
| Arch E1 | 762 x 1066.8 mm | 30 x 42 in | 9,000 x 12,600 | Architectural drawings and blueprints. |
| Arch E2 | 660 x 965 mm | 25.98 x 37.99 in | 7,795 x 11,398 | — |
| Arch E3 | 686 x 991 mm | 27.01 x 39.02 in | 8,102 x 11,705 | — |