B0
B-Series (ISO 216) · 7 specs
Direct Answer
B0 is the largest standard size in the ISO 216 B-series, measuring exactly 1000 × 1414 mm (39.37 × 55.67 inches) with a surface area of √2 square meters (~1.414 m²). Defined with an exact 1-meter short edge, it is the international standard for giant subway transit advertisements, commercial billboards, and wall cartography.
Source: ISO 216:2007 (DIN 476-1) · Last reviewed Aug 28, 2026
Specs
| Width × Height (Metric) | 1000 × 1414 mm |
| Width × Height (Imperial) | 39.37 × 55.67 in |
| Nominal Surface Area | 1.414 m² (√2 m² — 1,414,000 mm²) |
| Geometric Mean Origin | Geometric mean of A0 (841×1189 mm) and 2×A0 (1189×1682 mm) |
| Defining Dimension | Short edge is exactly 1.000 meter (1000 mm) |
| Weight of 80 gsm Sheet | 113.1 grams |
| Primary Applications | Subway transit billboard posters, large geographic wall maps, tradeshow backdrop banners |
The 1-Meter Base Dimension
While A0's surface area is 1 square meter with irregular millimeter dimensions (841 × 1189 mm), B0 has an exact 1-meter (1000 mm) side. This makes B-series rolls standard for 40-inch wide commercial printing presses and roll-fed plotters.
Filling the Intermediate Sizing Gap
Between consecutive A-series steps, surface area drops by 50%. The B-series provides mathematically intermediate sizes (B_n = √A_n × A_n-1) so publishers can produce posters and books that fall evenly between standard A-series tiers.