A3 is a paper size that is typically used for drawings, diagrams and large tables. It is also frequently used in laser printers to output two A4 pages as a spread., DIN A2: how big is such a page in mm or inches, what is it used for and which are the alternative international standard sizes., A4 A4 is a paper size that is used for a wide range of documents, including magazines, catalogs, letters and forms. Dimensions A4 measures 210 × 297 millimeters or 8.27 × 11.69 inches. In PostScript, its dimensions are rounded off to 595 × 842 points. Folded twice, an A4 sheet fits in a C6 size envelope (114 × 162 mm). Part of the ISO 216 , A6 A6 is a paper size that is often used for postcards. More exotic uses are small pocketbooks, library microfiche, and toilet paper. Dimensions A6 measures 105 × 148 millimeters or 4.13 × 5.83 inches. In PostScript, its dimensions are rounded off to 298 × 420 points. The matching envelope format is C6 (114 × 162 mm). Part of the ISO 216 , Many prefer a bit more bleed – 5 millimeters – especially for large books, thickish paper or jobs with many sections. Bleed requirements can be different from one printing company to another and from one job to another., Letter Letter is a paper size that is used for a wide range of documents, including magazines, catalogs, letters, and forms. It is also called ANSI A or American Quarto. Dimensions A Letter size page measures 215.9 × 279.4 millimeters or 8.50 × 11.00 inches. In PostScript, its dimensions are 612 × 792 points. Part of the ANSI standard.