de young art museum A2 paper can be a area of the set A series of paper. They are half the size of A1 paper. A series have different varieties in relation to sizes and are popular and widely accepted within the domain of printing as prime raw material for printing things. Talking of sizes, the bigger the paper number smaller may be the size and the other way around. For example A0 paper is biggest in dimensions as compared to other papers inside series. But look at the paper number, it reads 0 but in actuality its dimensions are bigger than the successors like A1, A2, A3, A4 and so forth. A2 paper is half how big is A1 paper and double the dimensions of A3 paper.