25 open: 168mmX228mm

folio

Folio is the size of a book, i.e. how many pages are cut out of a full sheet of printer paper.

Split specification

For the body of a book, the opening number has the same meaning as the folio, but for the front cover and insert, the meaning varies depending on the area. Usually the size of a single page publication is called an open page, such as newspapers, wall charts, etc. are divided into full page, folio, 4 pages, and 8 pages. Because international and domestic paper formats have several different series, although all cut to the same number, but different sizes. Books vary in size, although they are collectively referred to as how many folios are bound. A5 PU leather notebook supplier

In practice, a full sheet of paper with a width of 787 x 1092 mm (31 x 43 in) is usually referred to as positive paper; A full sheet of paper measuring 889 x 1194 mm (35 x 47 in) is called a large sheet. Because 787×1092mm paper format is defined by our country, does not conform to the international standard, is a non-standard format that needs to be eliminated. Due to domestic papermaking equipment, paper, existing paper and many other reasons, the new and old standards are still transitional. As of 2013, the main cutting specifications are: 210×297 (mm) for large 16 formats, 148×210 (mm) for large 32 formats and 105×148 (mm) for large 64 formats; The front face is 188×265 (mm) in 16 formats, 130×184 (mm) in 32 formats, and 92×126 (mm) in 64 formats.