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B Paper Sizes

Further Information

The dimensions of the B series paper sizes are defined by the ISO 216 international paper size standard. The B series is not as common as the A series. It was created to provide paper sizes that were not included in the A series. The B series uses an aspect ratio of 1:√2. The area of the B series paper sheets is the geometric mean of the A series sheets. For example, B1 is between A0 and A1 in size. While the B series is less common in office use, it is more regularly used in other special situations, such as posters, books, envelopes and passports.

Format Width × Height (mm) Width × Height (in)
B0 1000 × 1414 mm 39.37 × 55.669 in
B1 707 × 1000 mm 27.835 × 39.37 in
B1+ 720 × 1020 mm 28.346 × 40.157 in
B2 500 × 707 mm 19.685 × 27.835 in
B2+ 520 × 720 mm 20.472 × 28.346 in
B3 353 × 500 mm 13.898 × 19.685 in
B4 250 × 353 mm 9.843 × 13.898 in
B5 176 × 250 mm 6.929 × 9.843 in
B6 125 × 176 mm 4.921 × 6.929 in
B7 88 × 125 mm 3.465 × 4.921 in
B8 62 × 88 mm 2.441 × 3.465 in
B9 44 × 62 mm 1.732 × 2.441 in
B10 31 × 44 mm 1.22 × 1.732 in
B11 22 × 32 mm 0.866 × 1.26 in
B12 16 × 22 mm 0.63 × 0.866 in
B1 B2 B3 B4 B5 B6