I wonder if I may add to what has already been written about paper sizes. The subject was last discussed in Origami-L in January of this year. Karen Reeds alerted subscribers to the Web site already mentioned by Jorma Okansen and which I can strongly recommend at: This site shows up to be in Germany, and indeed, Germany was one of the very first countries to adopt the international sizes, before the 1939 – 1945 War. The matter was made the subject of a German DIN Standard. However, I understand that the idea for the standards originated much earlier, in the 19th Century. Today, the International Paper Sizes are the subject of an International Standard; ISO 216, issued by the[…]