B1 Paper Size
B1 measures 707 × 1000 mm (27.83 × 39.37 inches), making it the largest commonly used size in the ISO 216 B series. B1 sits between A1 and A0 in area, providing a large-format option for posters, wall charts, and institutional signage.
What Size is B1 in Inches?
B1 is 27.83 × 39.37 inches (707 × 1000 mm), the largest commonly used B series size and popular for large posters and wall charts.
| Unit | Width | Height |
|---|---|---|
| Inches | 27.83 | 39.37 |
| Millimeters | 707 | 1000 |
| Centimeters | 70.7 | 100.0 |
B1 in Pixels
Pixel dimensions depend on DPI (dots per inch). 300 DPI is the standard for commercial printing.
| DPI | Width (px) | Height (px) | Use |
|---|---|---|---|
| 72 | 2003 | 2835 | Screen display, digital proofs |
| 150 | 4174 | 5906 | Draft printing |
| 300 | 8348 | 11811 | Standard commercial print |
| 600 | 16696 | 23622 | High-quality or fine art print |
Use our free Inches to Pixels converter or Millimeters to Pixels converter to calculate pixel dimensions at any DPI.
B1 with Bleed
Standard bleed for ISO sizes is 3 mm per side. This adds 6 mm to both width and height.
| Measurement | Width | Height |
|---|---|---|
| With bleed (mm) | 713 | 1006 |
| With bleed (inches) | 28.07 | 39.61 |
| Pixels at 300 DPI (with bleed) | 8421 | 11882 |
Size Comparison
B1 is larger than A1 (594 × 841 mm) but smaller than A0 (841 × 1189 mm). At nearly one square meter, B1 provides significantly more printable area than A1 while remaining manageable for wall-mounted displays.
Common Uses
- Large posters and advertising displays
- Wall charts and educational diagrams
- Institutional signage and wayfinding
- Oversized maps and technical illustrations
Design Tips
- At 300 DPI, B1 files exceed 8000 × 11000 pixels — work at 150 DPI for initial layout and upscale for final output.
- Always include a 3 mm bleed and safe margins to prevent content loss during trimming.
- Verify your printer supports B1 natively. Many wide-format printers use roll feed, so confirm sheet-cut availability.
- Export final artwork as a press-ready PDF at 300 DPI for optimal print quality.
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