Did you know that the U.S., Canada and Mexico use a different system of paper sizes compared to the rest of the world? Exaclair products predominantly originate in France which utilizes the widespread international ISO 216 standard. A4 sizes were standardized in 1975 by the ISO (International Organization for Standardization) – the world’s largest developer of voluntary International Standards. The ISO story began in 1946 when delegates from 25 countries met at the Institute of Civil Engineers in London and decided to create a new international organization ‘to facilitate the international coordination and unification of industrial standards’.
Per Wiki: The international paper size standard, ISO 216, is based on the German DIN 476 standard for paper sizes. ISO paper sizes are all based on a single aspect ratio of square root of 2, or approximately 1:1.4142. The base A0 size of paper is defined to have an area of 1 m2. Rounded to millimetres, the A0 paper size is 841 by 1,189 millimetres (33.1 × 46.8 in).
Successive paper sizes in the series A1, A2, A3, and so forth, are defined by halving the preceding paper size across the larger dimension. The most frequently used paper size is A4 measuring 210 by 297 millimetres (8.3 × 11.7 in).
The image above was taken at the Haberdash Roosevelt Collection store in Chicago and is courtesy of bow tie_guy on Instagram.