Paper size is the dimensions of length and width of a paper in mm (millimeter or millimetre), and can also be converted into units in cm (centimeter or centimetre) or inch (in). In this case the A series paper size goes wide as international standards and has been set by the ISO (International Organization for Standardization).
Paper sizes A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10
A Series Paper Sizes, A0-A10, in mm, cm, inch
A Series paper sizes respectively are A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, defined by divided by 2 or half the size of previous paper on larger dimensions. While the most commonly used paper is A4, typically used for writing paper, card, document printing, envelopes, and also in applications such as Microsoft Word or Excel.
A series paper sizes in general is widely used throughout the world as used in the American continent. A4 paper size write letters to businesses become a standard in English speaking countries such as Australia, New Zealand and the UK. In Europe continental, A series paper sizes was adopted as an official standard in the middle of the 20th century and then after it spread around the world.