just learned americans have different standard paper sizes than everyone else. what do you MEAN you don’t have A4 as the standard. what do you mean your standard paper size isn’t even the same size as an A4. apparently it’s like. ’letter’ and ’legal’ and whatever else. help!!!
this is so scary
That has to be false. That's misinformation hold on
holy fucking shit
So I work in engineering; and always wondered who used these weird “A” sizes I’d see in large printer settings that I’ve never seen any company even have paper in stock for. Now I know.
And now I have to be one of those obnoxious US Americans because WHY THE FUCK WOULD YOU USE THESE WEIRD UNEVEN DIMENSIONS!? Even in metric most of the “A” settings are an annoying ratio! 210x297mm? 594x841mm!? What’s the point of using such small units of measurement if you’re not going to make sensible sizes!?
because the largest standard paper size is A0 which is exactly one square metre of paper with an aspect ratio of the square root of two. this gives us a nice simple measurement of area for the paper as well as allows us to do the halving/doubling magic. A1 is 0.5m², A2 is 0.25m² etc.
The halving/doubling magic that psychaun refers to is the fact that you can get each paper in the series by cutting the previous one in half. I fold some A4 paper in half, I have an A5 booklet. I tape two A4 pieces together along their long side, I have an A3 piece. Each piece of paper is half the area of the previous and half the width of the previous' length with a length the same as the previous' width. The aspect ratio is exactly the same for every size. This makes it very easy to resize things, fold things inside each other, and calculate the size of paper you've never used before based on its name. "I can resize this to fit any other paper size because the aspect ratio is identical," "I can fold a standard size in half to get the next standard size down" and "the area I'm working with can be multiplied up to fit into a metre squared without any messy fractions of leftover paper" are all far more practical considerations for a paper size than "the millimetre length of this paper size isn't a round number".
fyi there are also B sizes in paper, which fit in between the A sizes - less often used but good for book covers and stuff
a Bn size is the mean between An and An-1
and then C sizes for envelopes, such that a C4 envelope fits an unfolded sheet of A4 etc
....this actually explains a lot about some of the stationery I get from other countries, though.
















