The A Series paper size chart, below left, gives a visual representation of how the sizes relate to each other - for example A5 is half of A4 size paper and A2 is half of A1 size paper.

A series paper sizes and dimensions are defined by the ISO 216 international paper size standard. The A series is comman and world wide used paper size. The base A0 size of paper is defined as having an area of 1 m2 and a dimension ratio of 1 to √2.

A1纸张是使用纸张尺寸的国际标准。A类纸张的制定基础首先是求取一张长宽比为√2且面积为1平方米(m²)的纸张。因此这张纸的宽长分别为841毫米和1189毫米(长宽比为√2:1)，并且编号为A0。

A1 Paper Size Guide. Size A1 paper is the second largest paper format in the A series, defined by the international standard ISO 216 in 1975. To give you an idea of its scale, A1 paper has a surface area of 0.5 m² or 5,000 cm². That equates to 5.38 ft² or 775 in².

A1 is a paper size that is typically used for technical drawings, flip charts and posters. Dimensions. A1 measures 594 × 841 millimeters or 23.39 × 33.11 inches. In PostScript, its dimensions are rounded off to 1684 × 2384 points. Part of the ISO 216 standard. A1 is part of a set or range of page sizes, called the ISO A or ISO 216 standard.

The A1 format measures 594 x 841 mm or 23.4 x 33.1 inches. An A1 paper fromat has an aspect ratio of 1:1.42 . The Area of the A1 paper size is 499,554 mm² or 774.54 in² with a perimeter of 2,870 mm or 113 in .

A1 paper size measures 23.39 x 33.11 in inches, 594 x 841 in mm, and 59.4 x 84.1 in cm. Dimensions vary in pixels depends on the dpi/ppi applied. It is the second largest size in the ISO A series. If A1 is divided into two sheets in equal proportion, the size of each sheet is A2.

A1-size in cm, pixels, mm en inches. The A1 format is a commonly used paper format for posters and sidewalk signs. The size A1 reflects the size of a single sheet of paper.

A1 paper size is an ISO standard size, used in Europe and almost all around the world, except for North America, parts of South America and the Philippines. A1 is part of the A series. One sheet of A1 paper is exactly the double of the A2 size and the half of the A0 size .

A A1 format card has an aspect ratio of 594/841. The area of the A1 paper size is 4,995.54 cm² or 774.31 inch² with a perimeter of 287 cm or 112.99". A A1 format has a diagonal length of 84 cm or 33.07".