A4

A4 is a standard paper size used in many countries around the world. It is defined by the International Organization for Standardization (ISO) as having a size of 210 x 297 mm (8.27 x 11.69 inches). A4 paper is used for a variety of purposes, including printing, writing, and drawing. It is also used for a variety of other purposes, such as making envelopes, posters, and flyers.