B1 Paper Size
B1 paper measures 707 × 1000 mm (27.83 × 39.37 in).
| Millimetres | 707 × 1000 mm |
|---|---|
| Centimetres | 70.7 × 100 cm |
| Inches | 27.83 × 39.37 in |
| Aspect ratio (long ÷ short) | 1.414 |
| Series | ISO 216 B series (sizes between the A sizes) |
| Compare | A1 is 594 × 841 mm |
| Resolution | Width × height | Typical use |
|---|---|---|
| 72 PPI | 2004 × 2835 px | Screen design (PDF points) |
| 96 PPI | 2672 × 3780 px | Web / CSS pixels |
| 150 PPI | 4175 × 5906 px | Draft print quality |
| 300 PPI | 8350 × 11811 px | High-quality print |
| Paper weight | One sheet | 500 sheets (one ream) |
|---|---|---|
| 70 gsm | 49.49 g | 24.74 kg |
| 80 gsm | 56.56 g | 28.28 kg |
| 90 gsm | 63.63 g | 31.81 kg |
| 100 gsm | 70.70 g | 35.35 kg |
| 120 gsm | 84.84 g | 42.42 kg |
| 160 gsm | 113.12 g | 56.56 kg |
| Print onto | Scale |
|---|---|
| A5 paper | 20.9% |
| A4 paper | 29.7% |
| A3 paper | 42.0% |
| Letter paper | 27.9% |
| Legal paper | 30.5% |
Where you will see B1
B1 is a large poster size used for posters and wall displays.
About B1
B1 belongs to the ISO 216 B series. Each B size sits between two A sizes: B1 is larger than A1 and smaller than A0. The Japanese JIS B series uses different dimensions from ISO B, so check which standard a "B" size refers to.
Frequently asked questions
What are the dimensions of B1 paper?
B1 paper is 707 × 1000 mm (27.83 × 39.37 inches).
Is B1 bigger than A1?
Yes. B1 (707 × 1000 mm) is larger than A1 (594 × 841 mm).
Related
- B0 Paper Size1000 × 1414 mm
- B2 Paper Size500 × 707 mm
- A1 Paper Size594 × 841 mm
- How ISO Paper Sizes Work (A, B and C)Why A4 is 210 × 297 mm
Last updated: 2026-10-03