B Series Paper Sizes (ISO 216)
The B series is defined alongside the A series in ISO 216. B sizes fall geometrically between consecutive A sizes — each B size has an area that is the geometric mean of the corresponding A size and the next larger A size. This makes B sizes useful when A sizes are too small or too large for a particular application.
Like the A series, B sizes maintain the 1:√2 aspect ratio and each size is half the area of the next larger size.
Quick Reference
| Size | Inches | Millimeters | Common Use |
|---|---|---|---|
| B1 | 27.83 × 39.37 | 707 × 1000 | Large posters, wall charts |
| B2 | 19.69 × 27.83 | 500 × 707 | Posters, large-format printing |
| B3 | 13.90 × 19.69 | 353 × 500 | Small posters, menus |
| B4 | 9.84 × 13.90 | 250 × 353 | Books, newspapers, envelopes |
| B5 | 6.93 × 9.84 | 176 × 250 | Books, magazines, journals |
B1 Paper SizeB1 paper size is 707 × 1000 mm (27.83 × 39.37 inches). Full B1 dimensions in mm, inches, cm, and pixels at every DPI with bleed setup.
B2 Paper SizeB2 paper size is 500 × 707 mm (19.69 × 27.83 inches). Full B2 dimensions in mm, inches, cm, and pixels at every DPI with bleed setup.
B3 Paper SizeB3 paper size is 353 × 500 mm (13.90 × 19.69 inches). Full B3 dimensions in mm, inches, cm, and pixels at every DPI with bleed setup.
B4 Paper SizeB4 paper size is 250 × 353 mm (9.84 × 13.90 inches). Full B4 dimensions in mm, inches, cm, and pixels at every DPI with bleed setup.
B5 Paper SizeB5 paper size is 176 × 250 mm (6.93 × 9.84 inches). Full B5 dimensions in mm, inches, cm, and pixels at every DPI with bleed setup.