A4 is 210 x 297 millimeters (8.27 x 11.69 inches). Its measurements in PostScript are rounded to 595 x 842 points. An A4 page folded twice fits in a C6 envelope (114 x 162 mm). The term "A4 paper" is also used for papers that have the same size and composition as standard A4 paper, but which are not made by Agfa Corporation or its licensees. Such papers are usually sold under various brand names. For example, Arches Western Paper uses a wood pulp and cotton linings for its A4 papers, while Xerox uses a cotton liner with no wood pulp inside. Agfa produces two types of A4 paper: one with 110 g/m² and another with 150 g/m² weight per square meter (3.5 oz/sq yd and 4.5 oz/sq yd respectively). These weights are for plain paper; textured papers are heavier. An A4 sheet is the most common size used in office printing. It is used mainly for writing and drawing purposes. The word "sheet" here does not mean a large piece of paper but rather a single record on a printed page. Each page of a document is composed of one or more sheets.