2. Other paper sizes: A0 paper size is 8 1 cm * 19 cm, A 1 paper size is 54 cm *8 1 cm, A2 paper size is 42 cm *54 cm, A3 paper size is 27 cm *42 cm and A4 paper size is 2/4.
3. Paper size: Paper size refers to the range of paper sizes supported by folding machines and collating machines, generally including the maximum size and the minimum size, which are generally expressed by the specifications of the paper.
4. If the paper is larger or smaller than this size range, the product cannot be folded and matched.
5. According to the size, there are usually three formats: large format, medium format and small format.
6. For 787× 1092 paper, 12 is large format, 16 ~ 36 is medium format, and 40 is small format. However, books that focus on characters are generally in medium format.
7. folio shapes are rectangles with different proportions except 6 quarts, 12 quarts, 20 quarts, 24 quarts and 40 quarts, which are suitable for books with different properties and uses.