How much is the A4 size (unit mm)?
According to the basic area of the paper format, the format specification is divided into A series, B series and C series, format specifications for A0 size is 841mm * 1189mm, surface area of 1 square meters; the B0 size is 1000mm * 1414mm, surface area of 2.5 square meters; the C0 size is 917mm * 1279mm area, area of 2.25 square meters;
A4 specification: 210*297 mm paper specification refers to paper made, after trimming, cutting edge, cut into a certain size. In the past, how many "open" (such as 8 open or 16 open, etc.) to represent the size of the paper, and now I use international standards, specified in A0, A1, A2, B1, B2. and other marks to indicate the format of the paper specifications. The standard specifies the width of the paper (expressed in X) and the length (expressed in Y) as the ratio of X:Y=1:n.
The format of the copy paper is only A series and B series. If the A0 along the length of paper into two parts, will become the A1 specification, the A1 paper along the length direction of, will become the A2 specifications, so to open to the A8 specification; B8 paper also according to the method of opening to B8 specifications. The sizes of A0 ~ A8 and B0 to B8 are listed in the following table. Among them, A3, A4, A5, A6 and B4, B5, B6 and other 7 format specifications for copy paper commonly used specifications. For example: "A4" is the basic size of paper, paper folding type A 4, so a piece of A4 paper area is the basic area of paper 2 4 times of that of 1/16. And so on and so forth.
