Learn about the A series paper sizes, defined by ISO 216, from A0 to A10, and their dimensions in millimetres and inches. Find out how A3 size is used in different countries and how it differs from A3+ or Super A3. A3 Paper Name: A3 Standard: ISO Dimensions: 297mm x 420mm or 11.7" x 16.5" A3 Paper is a highly versatile paper size that can be used for large brochures, small posters, and advertisements. A3 Paper is half the size of the A2 Paper. A3 Paper has a width of 11.69” (297 mm) and height of 16.54” (420 mm). The surface area of A3 Paper is 1.35 ft2 (.125 m2). Learn the dimensions of A3+ size in centimeters, millimeters, inches, meters, points, pixels and other units. Compare A3+ with other A series paper sizes from A0 to A13.
