A6 size: 105× 148mm, and 4 inches× 6 inches is also A6.
B5 size: 176×250mm, B5 generally uses EXTRA, which is an international standard size. In addition, before 1982, the domestic standard was 182mmX257mm.
Extended data
According to the basic area of paper format, the format specifications are divided into A series, B series and C series. The format specification is:
The width dimension of A0 is 841mm×1189mm, and the width area is1m2;
B0 has a width of1000 mm×1414 mm and a width area of1.4m2;
The width dimension of C0 is 9 17mm× 1297mm, and the width area is1.2m2;
The format specification of copy paper only adopts A series and B series.
If A0 paper is split in half along the length direction, it becomes A 1 specification; If A 1 paper is split along the length direction, it becomes A2 specification, and so on, it becomes A8 specification; B0 paper is also divided into B8 standard according to this method. The format sizes of A0 ~ A8 and B0 ~ B8 are shown in the following table. Among them, A3, A4, A5, A6, B4, B5 and B6 are common specifications of copy paper.