First of all, half letter is simple because it is half of a letter size piece of paper. This paper is standard in the US. For A5 size, it is half of an A4 piece of paper. These paper sizes are standard in other countries outside of the US. Easy enough, right? Just order A4 pa...
An A4 piece of paper measures 8.3 x 11.7 inches (210 x 297 mm).[1] You can fold it in half 7 times, but the 7th fold will be tough (you may even need a friend to help you bend and crease the paper stack).[2] However, the total number of times you can fold any piece of ...