Letter Paper Size

Letter is a common American inch-based loose size. This size is different from ISO 216 international standards commonly used in other parts of the world, and this standard is mainly used in the United States, Canada, and the philippines. In the US loose size, Letter, Legal and Ledger / Tabloid are the most commonly used for everyday activities. The width of the Letter paper is 216mm(8.5 inches) and the height is 279mm(11 inches).

Format/name Letter
Width(mm) 216 mm
Width(in) 8.5 inches
Height(mm) 279 mm
Height(in) 11 inches

Taking our commonly used credit cards as a reference, the size of the credit card is 85.6 mm x 53.98 mm (3.4 in X 2.1 in). The paper size of Letter format is approximately 2.5 times the width of the credit card and approximately 5.2 times the height of the credit card.

paper width and height

US Common Paper Size

American loose sizes

North America, including the United States, Canada, and Mexico, is not applicable to ISO 216 international standard paper size, but has its own common paper size, as shown in the following table.

Format Width × Height (mm) Width × Height (cm) Width × Height (in)
Half Letter 140 × 216 mm 14 × 21.6 cm 5.5 × 8.5 in
Letter 216 × 279 mm 21.6 × 27.9 cm 8.5 × 11 in
Legal 216 × 356 mm 21.6 × 35.6 cm 8.5 × 14 in
Tabloid 279 × 432 mm 27.9 × 43.2 cm 11 × 17 in
Ledger 432 × 279 mm 43.2 × 27.9 mm 17 × 11 in
Junior Legal 127 × 203 mm 12.7 × 20.3 cm 5 × 8 in
Government Letter 203 × 267 mm 20.3 × 26.7 cm 8 × 10.5 in
Government Legal 216 × 330 mm 21.6 × 33 cm 8.5 × 13 in

ANSI Standard Paper Sizes

In 1992, ANSI / ASME Y14.1 adopted by the National Standard Association, De Facto Standard 8 1/2 in × 11 in "Letter", defined a series of paper sizes, and named "ANSI A", The series of paper sizes and ISO 216 international standards are similar, which will be cut into two halves will generate two next smaller sized paper.

Format Width × Height (mm) Width × Height (cm) Width × Height (in)
ANSI A 216 × 279 mm 21.6 × 27.9 cm 8.5 × 11 in
ANSI B 279 × 432 mm 27.9 × 43.2 cm 11 × 17 in
ANSI C 432 × 559 mm 43.2 × 55.9 cm 17 × 22 in
ANSI D 559 × 864 mm 55.9 × 86.4 cm 22 × 34 in
ANSI E 864 × 1118 mm 86.4 × 111.8 mm 34 × 44 in
ANSI series paper

Architectural Paper Sizes

In the ANSI / ASME Y14.1 standard adopted by the National Standards Association, a series of paper sizes for architectural purposes are also defined. The size of this series is mainly used by architects, because the paper in this series is 4: 3 and 3: 2, this is the ratio of small integers.

Format Width × Height (mm) Width × Height (cm) Width × Height (in)
Arch A 229 × 305 mm 22.9 × 30.5 cm 9 × 12 in
Arch B 305 × 457 mm 30.5 × 45.7 cm 12 × 18 in
Arch C 457 × 610 mm 45.7 × 61 cm 18 × 24 in
Arch D 610 × 914 mm 61 × 91.4 cm 24 × 36 in
Arch E 914 × 1219 mm 91.4 × 121.9 cm 36 × 48 in
Arch E1 762 × 1067 mm 76.2 × 106.7 cm 30 × 42 in
Arch E2 660 × 965 mm 66 × 96.5 cm 26 × 38 in
Arch E3 686 × 991 mm 68.6 × 99.1 cm 27 × 39 in
ARCH paper sizes

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