B4 Paper Size

B4 is a format in the B series paper, and the B series paper is a series of commonly used papers in the ISO 216 international paper standard, mainly used for posters, books, etc., the width of the B4 paper is 250mm(9.8 inches) and the height is 353mm(13.9 inches).

Format/name	B4
Width(mm)	250 mm
Width(in)	9.8 inches
Height(mm)	353 mm
Height(in)	13.9 inches

Taking our commonly used credit cards as a reference, the size of the credit card is 85.6 mm x 53.98 mm (3.4 in X 2.1 in). The paper size of B4 format is approximately 2.9 times the width of the credit card and approximately 6.5 times the height of the credit card.

ISO 216 is an international standard is a universal standard all over the world except in North America (the United States and Canada) and parts of Latin America.

B Series Paper Size

Format/name	Width × Height (mm)	Width × Height (cm)	Width × Height (in)
B0	1000 × 1414 mm	100 × 141.4 cm	39.4 × 55.7 in
B1	707 × 1000 mm	70.7 × 100 cm	27.8 × 39.4 in
B2	500 × 707 mm	50 × 70.7 cm	19.7 × 27.8 in
B3	353 × 500 mm	35.3 × 50 cm	13.9 × 19.7 in
B4	250 × 353 mm	25 × 35.3 cm	9.8 × 13.9 in
B5	176 × 250 mm	17.6 × 25 cm	6.9 × 9.8 in
B6	125 × 176 mm	12.5 × 17.6 cm	4.9 × 6.9 in
B7	88 × 125 mm	8.8 × 12.5 cm	3.5 × 4.9 in
B8	62 × 88 mm	6.2 × 8.8 cm	2.4 × 3.5 in
B9	44 × 62 mm	4.4 × 6.2 cm	1.7 × 2.4 in
B10	31 × 44 mm	3.1 × 4.4 cm	1.2 × 1.7 in
B11	22 × 31 mm	2.2 × 3.1 cm	0.9 × 1.2 in
B12	15 × 22 mm	1.5 × 2.2 cm	0.6 × 0.9 in
B13	11 × 15 mm	1.1 × 1.5 cm	0.4 × 0.6 in
B0+	1118 × 1580 mm	111.8 × 158 cm	44 × 62.2 in
B1+	720 × 1020 mm	72 × 102 cm	28.3 × 40.2 in
B2+	520 × 720 mm	52 × 72 cm	20.5 × 28.3 in