A1: Is the second largest of the

A1 is the second largest of the A series paper sizes defined by ISO 216. It has an area of 0.5 square meters and a √2 aspect ratio. Learn about its origins, uses, and how it relates to other A sizes. A1 is the second largest size in the ISO A series, measuring 23.39 x 33.11 in inches, 594 x 841 in mm, and 59.4 x 84.1 in cm. It is widely used in Europe, Asia, and Africa for posters, technical drawings, art, and photography. A Series paper sizes and formats: 4A0, 2A0, A0+, A0, A1+, A1, A2, A3+, A3, A4, A5, A6, A7, A8, A9... in mm, cm, m, inches, picas, pixels and points. A1 paper dimensions. The size of A1 paper is 594 x 841 mm or 59.4 x 84.1 cm, which is 23.4 x 33.1 inches. It’s normally used for advertising purposes, such as large posters and display banners. It can also be used in professional settings, for flipcharts and architectural drawings. Compared to other A series formats, a sheet of A1 paper is the same as: half an A0 sheet two A2 sheets four A3 sheets eight A4 sheets (and so on…)