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The sizes of the RA series are also slightly larger than corresponding inch-based US sizes specified in ANSI/ASME Y14.1, e.g. RA4 is roughly equivalent to 8 + 1 ⁄ 2 in × 12 in (220 mm × 300 mm) and ANSI A (alias US Letter) is defined as 8 + 1 ⁄ 2 in × 11 in (220 mm × 280 mm).
Most industry standards express the direction of the grain last when giving dimensions (that is, 17 × 11 inches is short grain paper and 11 × 17 inches is long grain paper), although alternatively the grain alignment can be explicitly indicated with an underline (11 × 17 is a short grain) or the letter "M" for "machine" (11M × 17 is a short ...
Successive paper sizes in the series (A1, A2, A3, etc.) are defined by halving the area of the preceding paper size and rounding down, so that the long side of A(n + 1) is the same length as the short side of An. Hence, each next size is nearly exactly half the area of the prior size. So, an A1 page can fit two A2 pages inside the same area.
A size chart illustrating the ANSI sizes. In 1992, the American National Standards Institute adopted ANSI/ASME Y14.1 Decimal Inch Drawing Sheet Size and Format, [1] which defined a regular series of paper sizes based upon the de facto standard 8 + 1 ⁄ 2 in × 11 in "letter" size to which it assigned the designation "ANSI A".
Bond paper is a high-quality durable writing paper similar to bank paper but having a weight greater than 50 g/m 2. The most common weights are 60 g/m 2 (16 lb), 75 g/m 2 (20 lb) and 90 g/m 2 (24 lb). The name comes from its having originally been made for documents such as government bonds.
Today in the United States, a half-foolscap sized paper for printing is standardized to 8 + 1 ⁄ 2 by 14 inches (216 mm × 356 mm), widely available and sold as "legal sized paper" for printing, writing, note-taking etc. A full foolscap size paper of 14 by 17 inches (356 mm × 432 mm) is also widely available for arts and crafts etc. alongside ...
However, a sheet of common copy paper that has a basis weight of 20 pounds (9.1 kg) does not have the same mass as the same size sheet of coarse paper (newsprint). In the former case, the standard ream is 500 sheets of 17-by-22-inch (432 by 559 mm) paper, and in the latter, 500 sheets of 24-by-36-inch (610 by 914 mm) paper.
A quire of paper is a measure of paper quantity. The usual meaning is 25 sheets of the same size and quality: 1 ⁄ 20 of a ream of 500 sheets. Quires of 25 sheets are often used for machine-made paper, while quires of 24 sheets are often used for handmade or specialised paper of 480-sheet reams.