Paper Sizes….. The Real Story…

17 10a

(A5 notebook on top of A4 sketch pad on top of A3 hardback sketchbook)

Turns out I didn’t completely understand paper sizes (Personal Notebook)….. but thanks to some smart people I think I’ve got it now. My sister Moira told me there’s a size A0. Then Damien (you might remember Damien from the Dublin Flamenco Festival last  year?) sent me the following….

….I’m going to be a bit geeky and correct you on the paper sizes. This is only on my mind because Nathalie and I have spent a lot of time designing posters for this year’s flamenco festival. Hard to believe it’s starting on Friday!!!! Where did the year go?
Anyway, I digress 🙂
In the A series of paper sizes, A0 is the largest. Each increment divides the paper size in half. So, A1 is half the size of A0, A2 is half the size of A1, A3 is half the size of A2,  A4 is half the size of A3, and so on.
All this halving gives us a nice little binary system. The number of the paper size ends up being the power of 2 of the number of sheets that fit into an A0, e.g.
A0 = 2 ^ 0 = 1 (1 sheet)
A1 = 2 ^ 1 = 2 (2 sheets of A1 in A0)
A2 = 2 ^ 2 = 4 (4 sheets of A2 in A0)
etc etc etc
Ok, geeking over :)…….”

(This is Damien)

Thank you Damien! Thank you also to Susanna who took the time to explain it like this…

“...or you could express it mathematically

A5 X 2 = A4
A4 X 2 = A3
A3 X 2 = A2
A2 x 2 = A1″


Now that I understand the paper sizes… I was wondering if anyone could help me with my drawing homework? Anyone? Mairead.