The size of the paper opening is measured in feet.
Paper size refers to the dimensions of a sheet of paper, typically measured in width and height. The most commonly used paper size is A4, which measures 210mm by 297mm. Other common sizes include A3 (297mm by 420mm), A5 (148mm by 210mm), and letter size (8.5 inches by 11 inches). Paper size is important as it determines the layout and formatting of documents, and can affect printing and copying costs.
纸张开数
全开
对开
3开
4开
5开
6开
7开
8开
9开
10开
11开
12开
13开
14开
15开
16开
18开
20开
21开
24开
25开
26开
27开
28开
30开
32开
36开
40开
50开
64开
