<P> In addition to the A series , there is a less common B series . The area of B series sheets is the geometric mean of successive A series sheets . So , B1 is between A0 and A1 in size , with an area of 0.707 m ( ​ ⁄ m ) . As a result , B0 is 1 metre wide , and other sizes in the B series are a half , a quarter or further fractions of a metre wide . While less common in office use , it is used for a variety of special situations . Many posters use B - series paper or a close approximation , such as 50 cm × 70 cm ; B5 is a relatively common choice for books . The B series is also used for envelopes and passports . The B - series is widely used in the printing industry to describe both paper sizes and printing press sizes , including digital presses . B3 paper is used to print two US letter or A4 pages side by side using imposition ; four pages would be printed on B2 , eight on B1 , etc . </P>
<P> In addition to the A series , there is a less common B series . The area of B series sheets is the geometric mean of successive A series sheets . So , B1 is between A0 and A1 in size , with an area of 0.707 m ( ​ ⁄ m ) . As a result , B0 is 1 metre wide , and other sizes in the B series are a half , a quarter or further fractions of a metre wide . While less common in office use , it is used for a variety of special situations . Many posters use B - series paper or a close approximation , such as 50 cm × 70 cm ; B5 is a relatively common choice for books . The B series is also used for envelopes and passports . The B - series is widely used in the printing industry to describe both paper sizes and printing press sizes , including digital presses . B3 paper is used to print two US letter or A4 pages side by side using imposition ; four pages would be printed on B2 , eight on B1 , etc . </P>
what is the size of a typical poster
what is the size of a typical poster
50 cm × 70 cm
50 cm × 70 cm