The length, width bai and area du of notebook A5 and B5 are different, and the area of B5 is larger than that of zhi A5 Enjoy Life A5 Spacer Spiral Notebook.

According to the basic area of the paper format, the format specifications are divided into A series, B series and C series. The format size of A0 format is 841mm×1189mm, and the format area is 1 square meter; the format size of B0 is 1000mm× 1414mm, the format area is 2.5 square meters; the format of C0 is 917mm×1279mm, and the format area is 2.25 square meters.

If the A0 paper is split into two equal parts along the length, it becomes the A1 size. If the A1 paper is split along the length, it becomes the A2 size, so it is split to the A8 size; the B8 paper is also split to B8 in this way. specification. The format sizes of A0～A8 and B0～B8 are listed in the table below. Among them, A3, A4, A5, A6 and B4, B5, B6 and other 7 format specifications are commonly used specifications for copy paper.