M&Ms of Jargon #3: A SERIES PAPER SIZES

M&Ms of Jargon #3: A SERIES PAPER SIZES
[what]
A simple explanation: The common paper sizes used universally
A complicated explanation (to feel smart): ISO metric standard paper size based on the square root of two ratio
[sizes]
The A0 sheet – the biggest size (841mm x 1189mm) is one square metre and each size (A1, A2, A3, A4, etc..) [...]