How You Really Use Mathematics To Define Paper Size

The rich history and intriguing math behind paper size!

Images from Wikimedia Commons (Portrait of Georg Christoph Lichtenberg on the left and an illustration of A series paper sizes on the right)

Have you ever wondered how paper size is defined? The most common paper size you and I probably use is the A4. If you work in or have exposure to technical disciplines, you would know about other paper sizes such as A0, A1, A2, etc. ISO 216:2007 defines most of the international paper…