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 x Height (mm) Width x Height (in)
B0 1000 x 1414 mm 39.4 x 55.7 in
B1 707 x 1000 mm 27.8 x 39.4 in
B1+ 720 x 1020 mm 28.3 x 40.2 in
B2 500 x 707 mm 19.7 x 27.8 in
B2+ 520 x 720 mm 20.5 x 28.3 in
B3 353 x 500 mm 13.9 x 19.7 in
B4 250 x 353 mm 9.8 x 13.9 in
B5 176 x 250 mm 6.9 x 9.8 in
B6 125 x 176 mm 4.9 x 6.9 in
B7 88 x 125 mm 3.5 x 4.9 in
B8 62 x 88 mm 2.4 x 3.5 in
B9 44 x 62 mm 1.7 x 2.4 in
B10 31 x 44 mm 1.2 x 1.7 in
B11 22 x 32 mm 0.9 x 1.3 in
B12 16 x 22 mm 0.6 x 0.9 in
B1 B2 B3 B4 B5 B6