The format size stipulated by the state is an international standard series, which has been incorporated into the national industry standard GB/T 1999 and implemented nationwide.

At present, the format size of books and periodicals is mainly series A specifications, as follows: A4 (16k) 297mm× 210mm; a5(32k)2 10mm× 148mm； There are three models of A6 (64k)144mm×105mm, of which A3(8k) has not been determined, but 420mm×297mm is widely used. A2 (2k) 420mm× 594mm.

Extended data:

Paper size refers to the paper size range supported by folding machine and collating machine, which generally includes the maximum size and minimum size, and is generally expressed by paper specifications. If it is larger or smaller than the paper in this size range, the product will not be folded and matched.

The international standard of paper is frank, and the size of the whole paper is1194 * 889 mm; Correctness is the domestic standard. The size of the whole paper is 1092*787mm. People divide the whole paper into n sheets, and the whole paper is also called full opening, and it is divided into two sheets, which is called folio. It is cut down continuously and evenly, that is, 4 sheets, 8 sheets, 16 sheets, 32 sheets and 64 sheets.

The front 16 aperture is 260 mm * 185 mm, and the generous 16 aperture is 285 mm *2 10 mm, which is the conventional printing size.

References:

Baidu Encyclopedia-16 Kaizhi