“Compack” is an A4-size folder that can be folded in half, perfect for those that want to carry documents intact, especially in packed trains during rush hour. The folder comes in three types, with ...

That is, ``If you fold or cut it in half, it will be one size smaller with the same aspect ratio.'' If you fold A4 size paper in half, it will be A5 size (148mm x 210mm), and if you connect two A4 ...

It is commonly claimed that you cannot fold a piece of paper in half more than seven times. That may be true for a standard piece of paper of A4 dimensions, but according to US teenage (at the time) ...

The effective reduction in paper size is 10% (330mm x 210mm for legal versus 297mm x 210 mm for A4), but the use of both sides for printing will potentially cut down paper consumption by half ...

with A0 being the largest and the most common size being A4. Each is half the area of the one before, ie A4 paper (297 mm × 210 mm) is half the size of A3 paper (297 mm × 420 mm).