Iso 216 paper sizes

CHF 58 Buy. Life cycle Previously Withdrawn. Final text received or FDIS registered for formal approval. Proof sent to secretariat or FDIS ballot initiated: 8 weeks. Close of voting. The A0 size is defined as having an area of one square meter 1 m 2. Paper weights is expressed in grams per square meter. Each smaller sheet size is exactly half the area of the previous size. ISO does not define sizes larger than A0 or B0. With the German standard DIN "Trimmed sizes of paper" the sizes can be expanded by using a factor in front of the size:.

Oversized sheets are used when it is desirable to give extra protection to the drawing sheets by providing a binding or trimming margin. The ISO B series are geometric means between the A series and defined to satisfy the requirements of sizes between the A series sizes.

Books often have a B5 size and passports a B7 size. B4, B5 and B6 are often applied to envelopes used for the C-series. The C series is defined in the ISO standard. The C series is mainly used for envelopes. The area of the C series is the geometric mean of the A and B series with the same number.

For example, a C4 is the geometric mean of the areas of an A4 and a B4 paper. A C4 is slightly larger than an A4 and slightly smaller than a B4. If you cut a sheet of paper in the width into two equal pieces, two sheets of paper with the same ratio will be created.

This is about 1. This ratio is also called the Lichtenberg ratio. If you cut a sheet of paper width into two equal pieces, two sheets of paper with the same ratio will be created. The A0 size is the first of the A-series paper sizes. An A2 has half the surface area of an A1, and so on.