No. 216
"Telling the story of the A4 size and format…"

Everyone knows the size and proportions of an A4 paper.
But have you ever considered why? I have. 
The magic ratio that keeps its proportions when you half or doubles its side. And if you start from the largest format of A0, the area equals one square meter. By definition.
That’s worth to celebrate I thought - and made a cupboard.