How many centimetres is B1?

B1 measures 70.7 × 100 cm (707 × 1000 mm) — commonly called a "70 by 100" poster. It is larger than A1 (59.4 × 84.1 cm) and half the size of B0.

Is B1 larger than A1?

Yes. B1 (707 × 1000 mm) is clearly larger than A1 (594 × 841 mm) — by over 11 cm in width and almost 16 cm in height. B sizes are always larger than A sizes with the same number.

How do I prepare a print file for a B1 poster?

Prepare a PDF at 707 × 1000 mm trim size with 3 mm bleed on each side, in CMYK and at least 150-300 DPI. Keep important graphics at least 5 mm from the trim line. After you order, the barwa.pl system verifies the file automatically.

B1 size — dimensions in cm and mm. B1 poster

Published: 14 lipca 2026

B1 measures 70.7 × 100 cm (707 × 1000 mm). The most popular large poster size.

B1 measures 707 × 1000 mm, i.e. 70.7 × 100 cm. It is the second largest B-series size (after B0) per ISO 216 and the most popular size for large advertising posters.

B1 compared to other sizes

B1 (707 × 1000 mm) is larger than A1 (594 × 841 mm),
two B2 posters (500 × 707 mm) side by side make exactly B1,
half of a B0 sheet (1000 × 1414 mm) is B1.

What B1 is used for

B1 posters are the standard for advertising columns, billboards, bus-stop display cases and shop walls. The large area keeps them readable from several metres away.

Printing B1 posters

Price your B1 poster online in the large-format poster calculator — instant result, no e-mail required.

Practical note: in poster printing the B1 format is commonly rounded to 700 × 1000 mm — this is also the size of a B1 poster at our print shop. The 7 mm difference from the ISO standard is unnoticeable in typical applications.