Sizes for Paper Screen and Tablet.

Sizes for Paper Screen and Tablet.

The sizes listed for screens tablets and paper can often be confusing with a number like A3, Tabloid or 8 1/2 X 11 given.  

Here is a reference for most of the sizes in use today whether European (Metric) or USA and Canadian which is mixed but mostly in Imperial English or Inch sizes. To two of the tables I have added the diagonal size since it is often quoted (Some times to confuse you as to practical size.). 

Sizes are in  both Metric and the American/Canadian sizes. In reality Canadians most often use the ANSI sizes for paper.

The majority of the information on this page is available at:

https://www.papersizes.org/

The ISO sizes are in wide use in Canada and the United States of America. The most confusion of North Americans will be for the ISO or Metric styles -- so they are first.

The ISO sizes are in wide use in Canada and the United States of America.

Table of Paper Sizes From 4A0 to A10

Size

Width x Height (mm)

Width x Height (in)

Diagonal mm

Diagonal Inches

4A0

1682 x 2378 mm

66.2 x 93.6 in

2912.73

114.67

2A0

1189 x 1682 mm

46.8 x 66.2 in

2059.82

81.10

A0

841 x 1189 mm

33.1 x 46.8 in

1456.37

57.34

A1

594 x 841 mm

23.4 x 33.1 in

1029.62

40.54

A2

420 x 594 mm

16.5 x 23.4 in

727.49

28.64

A3

297 x 420 mm

11.7 x 16.5 in

514.40

20.25

A4

210 x 297 mm

8.3 x 11.7 in

363.74

14.32

A5

148 x 210 mm

5.8 x 8.3 in

256.91

10.11

A6

105 x 148 mm

4.1 x 5.8 in

181.46

7.14

A7

74 x 105 mm

2.9 x 4.1 in

128.46

5.06

A8

52 x 74 mm

2.0 x 2.9 in

90.44

3.56

A9

37 x 52 mm

1.5 x 2.0 in

63.82

2.51

A10

26 x 37 mm

1.0 x 1.5 in

45.22

1.78

 

 

 Canadian Sizes (Not in wide Use as far as I know)

Table of Canadian Standard Paper Sizes

Size

Width x Height (mm)

Width x Height (in)

Aspect Ratio

ANSI

P1

560 x 860 mm

22.0 x 33.9 in

01:01.5

D

P2

430 x 560 mm

16.9 x 22.0 in

01:01.3

C

P3

280 x 430 mm

11.0 x 16.9 in

01:01.5

B

P4

215 x 280 mm

8.5 x 11.0 in

01:01.3

A

P5

140 x 210 mm

5.5 x 8.3 in

01:01.5

-

P6

105 x 140 mm

4.1 x 5.5 in

01:01.3

-

 

US Paper Sizes

US Paper Sizes

North America, including the US, Canada and parts of Mexico, is the only area of the first world that doesn't use the ISO 216 standard paper sizes, instead they use Letter, Legal, Executive and Ledger/Tabloid paper sizes and those that have been formalised in ASME Y14.1M - Metric Drawing Sheet Size & Format. US Envelope Sizes are also non ISO 216 and are listed on this page. The following table gives the sizes in millimeters and inches of the Commonly used American paper sizes.

Size

Width x Height (mm)

Width x Height (in)

Aspect Ratio

Half Letter

140 x 216 mm

5.5 x 8.5 in

01:01.5

Letter

216 x 279 mm

8.5 x 11.0 in

01:01.3

Legal

216 x 356 mm

8.5 x 14.0 in

01:01.6

Junior Legal

127 x 203 mm

5.0 x 8.0 in

01:01.6

Ledger / Tabloid

279 x 432 mm

11.0 x 17.0 in

01:01.5

 

ANSI Standard Paper Sizes

ANSI (American National Standards Institute) defined a regular series of paper sizes based around the Letter (8.5" x 11") format, with this becoming the A sizes and larger sizes being B,C,D & E. Surprisingly these ANSI standard sizes were defined in 1995 well after the ISO standard sizes. ANSI A sized paper is commonly referred to as Letter and ANSI B as Ledger or Tabloid.

Unlike the ISO standard sizes which have the single aspect ratio of 1:root2, ANSI standard sizes have two aspect ratios 1:1.2941 and 1:1.5455 which means that enlarging and reducing between the sizes is not as easy as with the ISO sizes and leaves wider margins on the enlarged/reduced document.

Size

Width x Height (mm)

Width x Height (in)

Aspect Ratio

Closest ISO

Diagonal (Inches)

Diagonal mm

A

216 x 279 mm

8.5 x 11.0 in

01:01.3

A4

13.90

352.84

B

279 x 432 mm

11.0 x 17.0 in

01:01.5

A3

19.01

514.26

C

432 x 559 mm

17.0 x 22.0 in

01:01.3

A2

27.80

706.47

D

559 x 864 mm

22.0 x 34.0 in

01:01.5

A1

40.50

1412.95

E

864 x 1118 mm

34.0 x 44.0 in

01:01.3

A0

55.61

1029.07

 

Architectural Paper Sizes

North America also has a special series of paper sizes defined for architectural purposes, in general these have aspect ratios of 4:3 or 3:2. These aspect ratios are very similar to the aspect ratio used for computer screens.

The following table gives details of the sizes for architectural paper.

Size

Width x Height (mm)

Width x Height (in)

Aspect Ratio

Arch A

229 x 305 mm

9.0 x 12.0 in

4:03

Arch B

305 x 457 mm

12.0 x 18.0 in

3:02

Arch C

457 x 610 mm

18.0 x 24.0 in

4:03

Arch D

610 x 914 mm

24.0 x 36.0 in

3:02

Arch E

914 x 1219 mm

36.0 x 48.0 in

4:03

Arch E1

762 x 1067 mm

30.0 x 42.0 in

7:05