A simple, free, comprehensive resource for finding the international standards for paper sizes in metric and imperial. A4 paper is one of the most widely used paper sizes in the world. Much like its US paper size equivalent “Letter,” it is essential in offices, schools, and homes alike. Its popularity stems not just from tradition but from a clever, standardized design that offers practicality. In this article, we’ll thoroughly dive into the topic of A4 paper by covering its advantages, dimensions, and common uses. A4 size is one of the paper sizes in the ISO A series, which was defined by ISO216 and first put forward by German scientist Georg Christoph Lichtenberg as DIN476 standard of Germany and later adopted by ISO. Under the same standard, there is also B size series, which follows the same rule as A series: ratio of length to width of a piece of paper should be √2:1. A4 is the most well-known and widely used paper size in the A-series format. It is the standard size for most printed documents ... A4 paper size international A4 size is an international paper size originating from the DIN standard (DIN 476 from 1922). This standard has been updated to the ISO 216 standard. In some parts of Germany, people still refer to it as DIN A4 . A4 is part of a series that includes A0, A1, A2, A3, A4 , A5, A6, A7, and A8.
