Letter (paper size)

letterletter sizeletter-sizeUS LetterLetter-sized8 1/2 x 118 1/2"x118" × 11" (20 × 28 cm)8.5 × 118.5"×11
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.wikipedia
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Paper size

tabloidduodecimoB5
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.
However, in some countries in the Americas as well as in the Philippines, the North American series of paper sizes such as 'Letter' and 'Legal' is more prevalent.

ISO 216

A4A5A4 paper
US Letter-size paper is a standard defined by the American National Standards Institute (ANSI, paper size A), in contrast to A4 paper used by most other countries, and adopted at varying dates, which is defined by the International Organization for Standardization, specifically in ISO 216.
For comparison, the letter paper size commonly used in North America (8+1/2 x) is about 6 mm (0.24 in) wider and 18 mm (0.71 in) shorter than A4.

United States

AmericanU.S.USA
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

Canada

CanadianCANCanadians
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

Chile

Republic of ChileChileanCHI
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

Colombia

COLRepublic of ColombiaColombian
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

Costa Rica

Costa RicanRepublic of Costa RicaCosta-Rica
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

Mexico

MexicanMéxicoMEX
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

Panama

PanamáRepublic of PanamaPAN
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

Dominican Republic

DominicanDOMDominicans
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

Philippines

FilipinoPhilippinePhilippine Islands
Letter or ANSI Letter is a paper size commonly used as home or office stationery in the United States, Canada, Chile, Colombia, Costa Rica, Mexico, Panama, the Dominican Republic and the Philippines.

American National Standards Institute

ANSIAmerican Standards AssociationAmerican National Standard
US Letter-size paper is a standard defined by the American National Standards Institute (ANSI, paper size A), in contrast to A4 paper used by most other countries, and adopted at varying dates, which is defined by the International Organization for Standardization, specifically in ISO 216.

International Organization for Standardization

ISOISO standardInternational Organisation for Standardisation
US Letter-size paper is a standard defined by the American National Standards Institute (ANSI, paper size A), in contrast to A4 paper used by most other countries, and adopted at varying dates, which is defined by the International Organization for Standardization, specifically in ISO 216.

Ronald Reagan

ReaganRonald W. ReaganPresident Reagan
The Reagan administration made Letter-size paper the norm for U.S. federal forms in the early 1980s; previously, the smaller "official" Government Letter size, 8 by, was used in government, while 8.5 by paper was standard in most other offices.

Aspect ratio

4:3aspect ratiosaspect-ratio
The aspect ratio is ≈1.294 and the diagonal is ≈13.901 in length.

Diagonal

off-diagonal elementdiagonalssuperdiagonal
The aspect ratio is ≈1.294 and the diagonal is ≈13.901 in length.

Units of paper quantity

quirequiresream
In the U.S., paper density is usually measured in "pounds per ream" (of 500 sheets). Typical Letter paper has a basis weight of paper of 20 or – the weight of 500 sheets (a ream) of 17 by 22 in paper at 70 F and at 50% humidity.

Grammage

basis weightgsmg/m 2
Typical Letter paper has a basis weight of paper of 20 or – the weight of 500 sheets (a ream) of 17 by 22 in paper at 70 F and at 50% humidity.

American Forest & Paper Association

American Forest and Paper AssociationAmerican Paper InstituteNational Forest Product Association
The American Forest & Paper Association says that the standard US dimensions have their origin in the days of manual paper making, the 11" length of the standard paper being about a quarter of "the average maximum stretch of an experienced vatman's arms". 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 in wide and 10 to 11 in high, and it is indeed almost exactly one quarter of the old Imperial (British) paper size known as Demy 4to - 17+1/2 by - allowing a 1/2 in for trimming.

Quarto

4to
The American Forest & Paper Association says that the standard US dimensions have their origin in the days of manual paper making, the 11" length of the standard paper being about a quarter of "the average maximum stretch of an experienced vatman's arms". 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 in wide and 10 to 11 in high, and it is indeed almost exactly one quarter of the old Imperial (British) paper size known as Demy 4to - 17+1/2 by - allowing a 1/2 in for trimming.

Addicted to War

Addicted to War: Why the U.S. Can't Kick Militarism
Addicted to War: Why The US Can't Kick Militarism, is a 77 letter-sized page "illustrated exposé" by Joel Andreas published by Frank Dorrel with AK Press in 2002 (ISBN: 1-904859-02-X).

Satellite Science Fiction

That issue saw the format change to letter size, in the hope that the magazine would be more prominent on newsstands.

Pencil board

shitajikipencil boardsdesk pad
Typically, they are B5 sized (slightly smaller than U.S. letter size), although other sizes are also available (typically A4 or A5).