The A3 size is 297 x 420 millimeters and 11.7 x 16.5 inches.
A3 size is a paper size commonly used for large pictures, graphics, and statistics.

A3 size:

Even though it is smaller than A4, A3 size is still used in work and homes all over the world today. It is widely used for presentations, graphics, or close-ups. Usually, you can find a copier that can print on A3 paper on the Internet. in society. A3 size is A0, and the latter is a reference because it is the largest standardized A size according to ISO 216. This standard began in 1975 and is a derivative version of the old German standard (DIN476-1922), which is based on written information A. Lichtenberg. In 1786, a professor invented this ratio, and now A size paper can be used. The same relationship is observed in all formats: if you decrease or increase the coefficient (for example, the conversion from A4 to A3 and vice versa), then width x√2=length (a / b = 2b / a = √ 2 or 1. 4142) On the contrary, on the contrary, the width of A3 corresponds to the length of A4, and the length corresponds to the width of A2. The A3 size is 420 x 297 mm, and the print area is 394 x 257 mm, which are 0.125 square feet or 0.15 square meters, 1.35 square feet, and 193 square meters, respectively.75 square inches. A3 is obtained by folding A2 in the width direction, and A3 is folded in the same manner as A4. Knowing that it is a piece of A0 (1 square meter) paper, you can calculate the weight of A3 paper. 80 grams/square meter, A3 80/8 paperweight = 10 grams: A3 is 297 x 420 mm or 11.69 x 16.54 inches; in PostScript, the size is rounded to 842 x 1190 pixels.

ISO 216:

A3 part or part of a page size group is called ISO A or ISO216. This international standard is based on the 1922 German standard DIN476.A3, and the corresponding title is usually called DINA3. JISP 0138-61-based on Japanese standards, used for paper of the same size. If you fold A3 in the shortest format in [* fr1], you will get an A4 document. The size of two adjacent A3 pages on a piece of paper is the same as the size of A2 paper. Different sizes can be made from A0 (one square meter) to A10. The aspect ratio of all sizes is the same: the roots of 1:1, 41, or 2 are continuously rounded to the nearest millimeter. Introduction: ISO 216 is an international paper size standard, except for certain regions in North America and Latin America, which are used worldwide. The standard defines many “A”, “B”, and “C” sizes, including A4, which is the most widely used paper size in the world. Two other standards, ISO 217 and ISO 269 define their respective paper formats. The ISO 269 “C” series are usually represented by A and B. According to ISO 216, all paper formats that comply with ISO 217 and ISO 269 (except for certain envelopes) have the same aspect ratio √2:1, rounded to the nearest millimeter. This ratio has a unique property: when two halves are cut in half. Their ratio is also the same. Each ISO paper size is half the area of ​​the second-largest paper in the same batch.

The history of the A3 paper:

On October 25, 1786, German scientist Georg Christoph Lichtenberg discovered the use of √2 in a letter to John Johann Beckmann, which first mentioned the advantages of the aspect ratio of the paper. The ISO paper sizes A2, A3, B3, B4, and B5 were developed in France and incorporated into the Licensing Act of 1798, which is partly based on page size. These have previously been used to reduce costs and increase the efficiency of storing paper and copying documents. In 1911, Wilhelm Ostwald proposed one hundred “global pulp forms” (Loi sur le Timbre) in 1786, with a ratio of 1:√2. The metric system is 1 cm wide. Portman (Portman) in a large number of articles published in 1918 believed that the solid foundation of the paper surface adhesive system may not be the length but the surface area, that is, the paper adhesive system and the use of two formulas x / y = 1: √2yx× y = 1 Portmann also pointed out that the size of paper containers (such as envelopes) should be 10% larger than your size. Later, in 1921, in the current speech of the German Industrial Standards Committee (NADI, “Deutsches Komiteefür Industriestandard”, today is the German Institute for Standardization, abbreviated as DIN), the German standard DI 476 was released, which defines the four relational documents.

SUMMARY:
The canonical format of the first line: √2, A-line is always the preferred format, which is the basis for other lines. All dimensions have been rounded to the nearest millimeter. The area A0 is 1 square meter, with rounding errors, the width is 841 mm, and the height is 1189 mm. Therefore, the actual area is 0.999949 square meters, and it is recommended to use A4 as the relevant personnel.

The resolution required for printing A3 images:

In order to successfully create an image, it must be a certain minimum resolution. The number of pixels depends on the desired output quality.

1. At 300 dpi (pixels per inch), the image should be 3508 x 4961 pixels. This is the resolution required for high-quality offset printing that can be seen at close range (for example, books, brochures, magazines, calendars, etc.). This is also the best resolution for photo albums, but for beautiful photos, you can use a lower number of pixels (250 dpi).
2. Under 150 dpi, the image should be 1754 x 2480 pixels. This is the lowest resolution for viewing newspapers or posters up close. Digital camera, good picture. It is possible to print high-quality A3 images at 12 megapixels or higher quality and resolution.

SUMMARY:
Since images of this size are usually viewed from a slightly longer distance, an 8-megapixel camera can still provide excellent quality.

Advantages: The chief benefit of the policy is scalability. Rectangular paper with an aspect ratio of √2 has a unique characteristic, that is, when cutting or folding between the longest sides, the aspect ratio of each half before being separated from the whole paper is √2. When two sheets of the same size √2 are placed next to each other along the longest side, they will form a larger rectangle with an aspect ratio of √2 and an area twice the size of each sheet. … The ISO paper size system uses this aspect ratio attributes √2. In each size series (such as A series), the largest size is assigned as the number 0 (such as A0), and each subsequent size (such as A1, A2, etc.) is half the area of ​​the previous sheet and can be cut To half the length of the previous size paper. The new value will be rounded to the nearest millimeter. Use the second largest paper for printing (for example, cut A4 paper in half to make an A5 page booklet. You can design a copier or office printer to reduce one side of A4 to A5 or enlarge one page from A4 to A3 size. Similarly, you can shrink two A4s to fit one A4 without unnecessary blank paper. The system also simplifies the calculation of paperweight. According to ISO 536, the weight of other dimensions cannot be calculated by arithmetic division in g/m2. The standard A4 paper of 80 g/m² weighs 5 g because it is 1/16 of the A0 page (four and a half, without rounding). Therefore, the weight and related transportation costs can be easily calculated by calculating ISO 216 and related standards. Published between 1975 and 1995: 1: ISO 216: 2007, defining A and B paper size series 2: ISO 269: 1985, defining envelope C series 3: ISO 217: 2013, defining RA and SRA series raw ( “Uncut”) paper size, the paperweight is defined as the weight of paper in grams (g) per square meter (abbreviated as g/m2 or g/m2).

Advantages:

The main advantage of this strategy is scalability. Rectangular paper with an aspect ratio of √2 has a unique characteristic, that is, when cutting or folding between the longest sides, the aspect ratio of each half is separated from the rest of the paper. Equal to √2. When two sheets of the same size √2 are placed side by side along the longest side, they will form a larger rectangle with an aspect ratio of √2, and the area is twice the size of each sheet. The sizing system uses these attributes with an aspect ratio of √2. In each size series (such as A series), the largest size is assigned as the number 0 (such as A0), and each subsequent size (such as A1, A2, etc.) is half the area of ​​the previous sheet of paper. Cut the paper of the previous size into half-length. The new value will be rounded to the nearest millimeter. Use the second largest paper for printing (for example, cut A4 paper in half to make a booklet on an A5 page. You can use a copier or office printer to reduce the page from A4 to A5 or enlarge the A4 page to A3size. You can also reduce two pieces of A4 paper to one piece of A4 paper without unnecessary white paper. The system also makes it easier to calculate the paperweight. According to ISO 536, the weight of other dimensions cannot be calculated by arithmetic division in g/m2. 80 grams/square meter weighs 5 grams because it is 1/16 of page A0 (four and a half, not rounded). Therefore, the weight and related transportation costs can be easily calculated by calculating ISO 216 and related standards. 1975 and 1995: 1: ISO 216: 2007, which defines the A and B series of paper formats 2: ISO 269: 1985, which defines the C series of envelopes; 3: ISO 217: 2013, which defines the RA and SRA series Size of base paper (“uncut”), the paperweight is defined as the weight of the paper in grams (g) per square meter (abbreviated as g/m2 or g/m2).

The attributes of ISO series 3:

Series A-
The aspect ratio of the series is √2 (rounded to 1414). Before rounding A0 to the nearest millimeter, its area is 1 square meter. The stack size (A1, A2, A3, etc.) is determined by dividing the area of ​​the previous sheet size by half and rounding up so that the long side A (n + 1) is the same length as the short side. Therefore, each continuous size is almost half of the above-mentioned size, so an A1 page can accommodate 2 A2 pages in the same area. A4 is 210 mm by 297 mm (0.27 inches), which is almost exactly 0.0625 square meters. In contrast, the letterhead size commonly used in North America (8 1⁄2" x 11", 216 mm x 279 mm) is 6 mm (0). It is 24 inches wider and 18 mm shorter than A4. Therefore, the A5 paper size is half of the A4 paper size, such as 148 mm x 210 mm (5.8" x 8.3"). As shown in Figure 2, the A series maintains the aspect ratio of each subsequent rectangle after being cut or folded in half perpendicular to the larger side. For rectangles with longer x sides and shorter y sides, make sure that the x/y aspect ratio matches the y/x/2 rectangle, which is half the size. H.X / y = y / x / 2 is simplified as x / y =√2; in other words, the aspect ratio is 1:√2. Approximate size (cm).

B Series-
The definition of line B in the standard is as follows:
"The size of another line is obtained by continuous geometric positioning between adjacent dimensions of line A. Using geometric average, each step: B0, A0, B1, A1, B2. Every time it is less, and the previous step is multiplied by the same multiple. Like series A, the aspect ratio of series B is √2 plus half (rounded to the nearest millimeter) to get the next line.

The smallest surface B0 is specifically 1 meter. There is also an inappropriate Japanese B series. According to JIS, its calibration space is 1.5 times that of the corresponding JIS-A series. (Such as ISO-A series). Accordingly, the range of JIS-B series paper is 1.5 moments the length 1.22 times matching: ISO B series paper is 4√2≈1.19 terms greater than A-series paper.

C Series:
The setting of the C series is {price} based on the form of B series, and includes the format of A3 series, and its range is constant (for example, C2 is the geometric mean between B2 and A2). As for the A and B series, the ratio is √2, and the C series size is mainly used for envelopes. C4 envelopes can be used for A4 pages. The aspect ratio of C series envelopes is the same as that of A3 series envelopes. For example, if you fold an A4 page in half, it will fit in a C5 envelope (this is the size of a C4 envelope folded in half). Therefore, the length of ISO C series paper is 8√2≈1.09 times its length. Size series paper. Dimensions A3, B, and C are matched as part of the geometric gradient, and the continuous aspect ratio is 8√2, although there is no dimension between Bn and A (n -1): A4, C4, B4, D4", A3size. There is such a D series in the Swedish extended version of the system.

What is the A3 size for writing?

A3 size is usually applied in trade and intimate living. The size of 297 x 420 mm is a great choice for displaying presentations, graphs, and enlarged pictures. This is a popular and economical option because it can be obtained easily and cheaply in wholesale. In addition to A0, A1, and A2 sizes, A3 size paper also provides enough space to create stunning images, thereby arousing the interest of the target audience.

When should I use A3 Size for print?

The surface area of ​​A3 size paper is large enough to create any of your design ideas. This function is also ideal if you want to insert brand information that is not limited by space. You can also use this format size to display your family photos at home. For example, we provide photo posters available on A3 size paper. After placing the order, just upload the picture online. We can print your image on special paper of 190 g/m2 and deliver it to you immediately. On the other hand, you can also use A3 to send information about upcoming events in the target market. These can be manuals. The design should be as concise as possible, and the text should be slightly thicker to make the information clear. Hang them on the walls and billboards inconspicuously. Another way to use the A3 size is to create a presentation that contains several large tables or charts. In fact, for the convenience of the assistant, you can spread this form on the table. Using this essay format, you can present your ideas to the target group more clearly.

Paper Size-(Basic Knowledge)

At first glance, the paper size may be a bit confusing. All these seemingly incoherent letters and numbers do not constitute any meaning to the eye in form. I am relieved to learn that things will become easy. I will start with the most common paper size group A series. Standardized according to ISO 216, this is a group of paper sizes that you may already be familiar with. The naming convention for the series is simple. Use the letter A followed by a number. I am sure you already know A4. This is most likely the size of the paper used by the printer, the size of the letter received in the publication, and almost the most commonly used paper size in the world.

Conclusion:

OK, so you have a general idea of ​​what A4 is, and what about the rest? If you want to load sizes from A4 to A3 size (the smaller the number, the larger the drawing), please double the size of the shorter edge. For example, a piece of A4 paper is 210 mm x 297 mm, and the shortest side is 210 mm long. A3 size paper is 420 mm x 297 mm. Load the format 210 x 2 =420. Flat paper exactly corresponds to 2 sheets of A4 paper. For example, suppose we want to increase the size to A2. You will find that the original shortest side is now the longest. Our current A3 paper size is 297mm x 420mm. This means that we need to fold the sides of the new shorter edge, which is the 297mm edge. If you add 297 + 297 = 594 this time, the A2 size is 420mm x 594mm. The size is 2 sheets A3 or 4 sheets A4.

Frequently Asked Questions:

Q1: A3 is greater than A4?
A: If you increase the size of A4 from 1 to A3 (the smaller the number, the larger the paper), you will double the size of the shorter margin. For example, A4 paper-210 mm. x 297 mm, which shortens the edge by 210 mm.

Q2: Is 11x17 the same as A3?
A: Check out our A3 paper products. The size is different, but the relative paper size is the same. For example, 11 sheets of “x17” paper in the United States are functionally equivalent to A3 paper in Europe or Japan.

Q3: Is A3 legal​​?
A: How big is the legal document. Except for Canada and the United States, paper formats have been standardized to ISO formats worldwide. A4 = 216 x 279 mm (8.5 x 11 inches) A3 = 279 mm x 432 mm (11 x 17 inches).

Q4: Why is there no A3 option in Word?
A: The printer driver software provides Word Pages settings for the installed printer driver. Word does not provide them. Fax and A3 printers are not available. Now, switching from Microsoft Print to PDF, A3 should be displayed as available.

Q5: Is A5 bigger than B5?
A: B5 paper in both formats is larger than A5. Both sizes of B6 are smaller than A5. Q6: How many A3s are there in A1? A: A3 is four times smaller than A1 paper.

Q7: What is A3 printing?
A: A3 size is 11.69" x 16.53" universal document size, related to 11" x 17" document (record). A3 MFP can handle A3, A4, letters, ledgers, and legal documents, and choose smaller paper sizes (such as envelopes).

Q8: How to create a Word document in A3 size?
A: Click on this link:

Q9: A3 size is greater than A1?
A: A3 size is many times smaller than A1 paper.

Q10: How to shorten A1 to A3?
A: Most printers allow you to manually zoom the A1 layout to A3 for printing by changing the zoom ratio setting to 50%.