A1, A2, A3, A4_ paper size

A1, A2, A3, A4_ paper size A1, A2, A3, A4_ paper size -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- The resolution of an inch. A0 = 1189 * 841 mm A1 = 841 * 594 mm A2 = 594 * 420 mm A3 = 420 * 297 mm A4 = 210 * 297 mm Group A A0 841 x 1189 mm A1 594 x 841 A2 420 x 594 A3 297 x 420 A4 210 x 297 A5 148 x 210 A6 105 x 148 A7 74 x 105 A8 52 x 74 A9 37 x 52 A10 26 x 37 Group B B0 1000 x 1414 mm B1 707 x 1000 500 x 707 B2 B3 353 x 500 B4 250 x 353 B5 176 x 250 B6, 125 by 176 B7 88 x 125 B8 62 x 88 B8 62 x 88 B9 44 x 62 B10 31 x 44 Group C C0 917 x 1297 mm C1 648 x 917 C2 458 x 648 C3 324 x 458 C4 229 x 324 C5 162 x 229 C6 114 x 162 C7 81 x 114 C8 57 x 81 DL 110 x 110 C7/6 81 x 162 The width of A group of paper sizes is 1: the square root of 2, and then the nearest millimeter. A0 is defined as a square meter of paper with a width of 1: square root of 2. The next A1, A2, A3... The size of a piece of paper is defined as a piece of paper with a number of no. 1 on the long side of the page, and then the nearest millimeter. The most commonly used paper size is A4, which is 210 times 297 mm. The paper size of group B is the geometric average of A group of paper with the same number and number one. For example,B1 is the geometric average of A1 and A0. Similarly, the paper size of group C is the same as the geometric average of A and B papers. For example, C2 is the geometric average of B2 and A2. (in addition, Japan has an incompatibilities in the size of paper B, defined by arithmetic mean rather than geometric averages.) The paper size of C is mainly used in envelopes. An A4 sheet of paper can fit in a C4 sized envelope. If you fold the A4 paper into a 5 piece of paper, it will fit into the C5 envelope, and so on. A4 size: 210 * 297 mm The size of a piece of paper is made of paper and then trimmed to a certain size. In the past, the size of the paper was represented by how much "open" (e.g., 8, 16, etc.), and now I adopt the international standard, which is A0, A1, A2, B1, B2... Such markers represent the size of the paper. The ratio of the width of the paper to the width of the paper (in terms of X) and length (in terms of Y) is X: Y = 1: n. According to the basic area of the paper, the size is divided into A series, B series and C series, which is 841mm by 1189mm, and the width is 1 square meter. The size of B0 is 1000mm by 1414mm, and the area is 2.5 square meters. The size of C0 is 917mm by 1279mm, with a width of 2.25 square meters. The size of the paper is only used in series A and B. If the A0 paper is divided into two equal parts in length, it becomes the A1 specification, and the A1 piece of paper is split along the length, so it becomes the A2 specification, which is the same as the A8 specification.B8 paper is also opened to B8 specification. The size of A0 ~ A8 and B0 ~ B8 are shown in the table below. There are seven sizes for photocopier paper, including A3, A4, A5, A6 and B4, B5, B6, etc. For example, "A4" paper, which is A paper folding A basic size of A, is folded four times, so the area of A piece of A4 paper is one of two to the fourth power of the basic paper area, which is 1/16. The rest depends on this kind of push. The A4 is the international standard paper size 210 * 297mm The size of A4 paper is 210mm by 297mm, When you set a resolution of 72 pixels per inch, the pixel of the size of the A4 is 595 by 842, When you set the resolution at 150 pixels per inch, the pixel of the size of the A4 is 1240 by 1754, When you set the resolution at 300 pixels per inch, the pixel of the size of the A4 is 2479 times 3508, You choose different resolutions, and the pixel size of the image changes. Of course, don't forget an inch = 25.4mm. A4 is 2480 * 3508 pixels 210 * 297 mm The size of A4 paper is 210mm by 297mm, When you set the resolution in photoshop at 72 pixels per inch, the size of the A4 size image is 595 x In 842, When you set the resolution in photoshop at 150 pixels per inch, the size of the A4 size image is 1240 pixels By 1754, When you set the resolution in photoshop at 300 pixels per inch, the pixel size of the A4 size is 2479 By 3508, You choose different resolutions, and the pixel size of the image changes. Of course,Don't forget an inch = 25.4mm. = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Version 2: What is the paper size of A1, A2, A3 and A4? ISO 216 defines the size of A, B, and C. The paper size of C is mainly used in envelopes. The width of A group of paper sizes is 1: the square root of 2, and then the nearest millimeter. A0 is defined as a square meter of paper with a width of 1: square root of 2. The next A1, A2, A3... The size of a piece of paper is defined as a piece of paper with a number of no. 1 on the long side of the page, and then the nearest millimeter. The most commonly used paper size is A4, which is 210 times 297 mm. The paper size of group B is the geometric average of A group of paper with the same number and number one. For example, B1 is the geometric average of A1 and A0. Similarly, the paper size of group C is the same as the geometric average of A and B papers. For example, C2 is the geometric average of B2 and A2. (in addition, Japan has an incompatibilities in the size of paper B, defined by arithmetic mean rather than geometric averages.) The paper size of C is mainly used in envelopes. An A4 sheet of paper can fit in a C4 sized envelope. If you fold the A4 paper into a 5 piece of paper, it will fit into the C5 envelope, and so on. Before ISO 216 was widely adopted, there were many different paper formats in the world. These formats are not a coherent system,And many of them are not defined in metric units. ISO 216 format follows 1: square root of 2; Two pieces of paper together have the same length and the side. This feature simplifies a lot of things, such as narrowing down two A4 sheets of paper into an A4 sheet of paper. Enlarge an A4 sheet of paper to an A3 paper. Copy and enlarge half of the A4 sheet of paper to a piece of A4 paper and so on. The main barriers to this standard are the United States and Canada, which still use Letter, Legal, and Executive paper size systems. (Canada USES a type of paper size for paper, but it is actually the size of the paper used in the United States, and then takes the closest metric.) National standard GB/T 148-1997 "printing, writing and drawing paper size" and ISO 216:1975 non-equivalent. The Chinese national standards of the republic of China, CNS 5 "paper scale (after cutting)," is similar to ISO 216. Group A A0 841 x 1189 A1 594 x 841 A2 420 x 594 A3 297 x 420 A4 210 x 297 A5 148 x 210 A6 105 x 148 A7 74 x 105 A8 52 x 74 A9 37 x 52 A10 26 x 37 Group B B0 1000 x 1414 B1 707 x 1000 500 x 707 B2 B3 353 x 500 B4 250 x 353 B5 176 x 250 B6, 125 by 176 B7 88 x 125 B8 62 x 88 B8 62 x 88 B9 44 x 62 B10 31 x 44 Group C C0 917 x 1297 C1 648 x 917 C2 458 x 648324×458 C4 229×324 C5 162×229 C6 114×162 C7 81×81 57 - 8×81 DL 110×220 C7/6 81×162