Paper × 841 mm). A1 is half the size of a sheet of A0 (i.e., 594 mm × 841 mm), such that two sheets of A1 placed side by side are equal to one sheet of A0. A2 is half the size of a sheet of A1, and so forth. Common sizes used in the office and the home are A4 and A3 (A3 is the size of two A4 sheets). The density of paper ranges from for tissue paper to for some speciality paper. Printing paper is about . Paper may be classified into seven categories: Some paper types include:
Folded leaflet Also known as a spiral fold, tri fold, brochure fold, business letter, C fold, roll fold and barrel fold. Also known as a window fold. In double parallel folds the paper is folded in half and then folded in half again with a fold parallel to the first fold. To allow for proper nesting the two inside folded panels are 1/32" to 1/8" smaller than the two outer panels. In double gatefolds there are three parallel folds. The left and right edges of the paper fold and meet in the middle, without overlapping, along a center fold. The outer panels