A0 is also exactly 1 square meter which makes it easy to figure out the number of pages of e.g. A4 from weight if you know what kind of gramm per square meter paper you are dealing with (which is why that is often part of the packaging).
The aspect ratio of the two sides is the square root of 2 since you otherwise couldn’t divide it again and again and get sizes with the same aspect ratio.
Yeah sounds like you want A5
https://www.pixartprinting.es/blog/wp-content/uploads/2022/09/paper_sizes.jpg
a better graphic ☞
A0 is also exactly 1 square meter which makes it easy to figure out the number of pages of e.g. A4 from weight if you know what kind of gramm per square meter paper you are dealing with (which is why that is often part of the packaging).
The aspect ratio of the two sides is the square root of 2 since you otherwise couldn’t divide it again and again and get sizes with the same aspect ratio.
TIL! Thanks!
Just FYI the US Customary units for A4 are wrong on that image. For my fellow Americans, it’s 8.3" x 11.7".