Letter paper tiled with equilateral trianglesA Letter-size pageComparison of Letter (shaded light blue) and Government letter sizes with some similar paper and photographic paper sizes
The Reagan administration made Letter-size paper the norm for US federal forms in the early 1980s; previously, the smaller "official" Government Letter size, 8 by 10.5 inches (203.2 by 266.7 mm) (aspect ratio: 1.3125), was used in government, while 8.5-by-11-inch (215.9 by 279.4 mm) paper was standard in most other offices.[2] The aspect ratio is 22/17 ≈ 1.294 and the diagonal is √8.52 + 112 ≈ 13.901 inches (353.1 mm) in length.
In the US, paper density is usually measured in "pound per reams" (of 500 sheets). Typical Letter paper has a basis weight of paper of 20 or 24 pounds (9.1 or 10.9 kg) – the weight of 500 sheets (a ream) of 17-by-22-inch (431.8 by 558.8 mm) paper at 70 °F (21 °C) and at 50% humidity.[3] One ream of 20-pound Letter-sized paper weighs 5 pounds (2.3 kg), and a single Letter-sized sheet of 20-pound paper weighs 0.16 ounces (4.536 g), which is equivalent to 75.19 g/m2. Some metric information is typically included on American ream packaging. For example, 20-pound paper is also labeled as 75 g/m2. The most common density of A4 paper is 80 g/m2.
The related paper size known as Invoice (colloquially Half Letter) is exactly one half of the US Letter size: 8.5 by 5.5 inches (215.9 by 139.7 mm).
Historyedit
The precise origins of the dimensions of US letter-size paper (8.5 × 11 in) are not known. The American Forest & Paper Association says that the standard US dimensions have their origin in the days of manual papermaking, the 11-inch length of the standard paper being about a quarter of "the average maximum stretch of an experienced vatman's arms".[2] The letter size falls within the range of the historical quarto size, which since pre-modern times refers to page sizes of 8 to 9 inches (200 to 230 mm) wide and 10 to 11 inches (250 to 280 mm) high, and it is indeed almost exactly one quarter of the old Imperial (British) paper size known as demy quarto – 17+1⁄2 by 22+1⁄2 inches (440 by 570 mm) – allowing a 1⁄2 inch (13 mm) for trimming.[4]
^"US Letter" is the primary paper size used in Belize, Canada, Chile, Colombia, Costa Rica, El Salvador, Guatemala, Mexico, Nicaragua, Panama, Philippines, Puerto Rico, United States, Venezuela according to "Territory Information". Common Locale Data Repository. 45. 2024-04-16. from the original on 2024-05-03. Retrieved 2024-05-03.
^ abAmerican Forest and Paper Association. . Archived from the original on February 20, 2012. Retrieved 2014-02-20.
^Blocksma, Mary. Reading the Numbers. New York: Penguin Books, 1989.
^Fyffe, Charles (1969). Basic Copyfitting. London: Studio Vista. p. 74. ISBN0-289-79705-5.
January 01, 1970
letter, paper, size, confused, with, letter, sheet, letter, officially, ansi, paper, size, standard, defined, ansi, asme, american, national, standards, institute, commonly, used, home, office, stationery, primarily, united, states, canada, philippines, variab. Not to be confused with Letter sheet Letter officially ANSI A is a paper size standard defined in ANSI ASME Y14 1 by the American National Standards Institute commonly used as home or office stationery primarily in the United States Canada and the Philippines and variably across Latin America 1 It measures 8 5 by 11 inches 215 9 by 279 4 mm and is similar in use to the A4 paper standard at 210 mm 297 mm 8 27 in 11 7 in used by most other countries defined in ISO 216 by the International Organization for Standardization Letter paper tiled with equilateral triangles A Letter size page Comparison of Letter shaded light blue and Government letter sizes with some similar paper and photographic paper sizes Contents 1 Details 2 History 3 See also 4 ReferencesDetails editThe Reagan administration made Letter size paper the norm for US federal forms in the early 1980s previously the smaller official Government Letter size 8 by 10 5 inches 203 2 by 266 7 mm aspect ratio 1 3125 was used in government while 8 5 by 11 inch 215 9 by 279 4 mm paper was standard in most other offices 2 The aspect ratio is 22 17 1 294 and the diagonal is 8 52 112 13 901 inches 353 1 mm in length In the US paper density is usually measured in pound per reams of 500 sheets Typical Letter paper has a basis weight of paper of 20 or 24 pounds 9 1 or 10 9 kg the weight of 500 sheets a ream of 17 by 22 inch 431 8 by 558 8 mm paper at 70 F 21 C and at 50 humidity 3 One ream of 20 pound Letter sized paper weighs 5 pounds 2 3 kg and a single Letter sized sheet of 20 pound paper weighs 0 16 ounces 4 536 g which is equivalent to 75 19 g m2 Some metric information is typically included on American ream packaging For example 20 pound paper is also labeled as 75 g m2 The most common density of A4 paper is 80 g m2 The related paper size known as Invoice colloquially Half Letter is exactly one half of the US Letter size 8 5 by 5 5 inches 215 9 by 139 7 mm History editThe precise origins of the dimensions of US letter size paper 8 5 11 in are not known The American Forest amp Paper Association says that the standard US dimensions have their origin in the days of manual papermaking the 11 inch length of the standard paper being about a quarter of the average maximum stretch of an experienced vatman s arms 2 The letter size falls within the range of the historical quarto size which since pre modern times refers to page sizes of 8 to 9 inches 200 to 230 mm wide and 10 to 11 inches 250 to 280 mm high and it is indeed almost exactly one quarter of the old Imperial British paper size known as demy quarto 17 1 2 by 22 1 2 inches 440 by 570 mm allowing a 1 2 inch 13 mm for trimming 4 See also editANSI ASME Y14 1 ISO 216 Paper size Loose sizesReferences edit US Letter is the primary paper size used in Belize Canada Chile Colombia Costa Rica El Salvador Guatemala Mexico Nicaragua Panama Philippines Puerto Rico United States Venezuela according to Territory Information Common Locale Data Repository 45 2024 04 16 Archived from the original on 2024 05 03 Retrieved 2024 05 03 a b American Forest and Paper Association Why is the standard paper size in the U S 8 x 11 Archived from the original on February 20 2012 Retrieved 2014 02 20 Blocksma Mary Reading the Numbers New York Penguin Books 1989 Fyffe Charles 1969 Basic Copyfitting London Studio Vista p 74 ISBN 0 289 79705 5 Retrieved from https en wikipedia org w index php title Letter paper size amp oldid 1222035513, wikipedia, wiki, book, books, library,
