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Paper Sizes
Last Updated 10/14/09
United States Paper Sizes in Inches
Name  Size 
Executive  7.5 x 10 
A (letter)  8 1/2 x 11 
Legal  8.5 x 14 
B (ledger or tabloid)  11 x 17 
Super A3/B  13 x 19 
C  17 x 22 
D  22 x 34 
E  34 x 44 
F  28 x 40 
G  11 x (22 1/2 to 90) 
H  28 x (44 to 143) 
J  34 x (55 to 176) 
K  40 x (55 to 143) 
Metric Trimmed Paper Sizes
Metric Name  Metric Size in mm  Size in Inches  Closest United States Size  Size in Inches 
A8  53 x 74  2.07 x 2.91  Business card  2 x 3 1/2 
A7  74 x 105  2.91 x 4.13  3 x 5  3 x 5 
A6  105 x 148  4.13 x 5.83  Microfiche  4.13 x 5.83 
A5  148 x 210  5.83 x 8.27  5 x 8  5 x 8 
A4  210 x 297  8.27 x 11.69  A  8 1/2 x 11 
A3  297 x 420  11.69 x 16.54  B  11 x 17 
A2  420 x 594  16.54 x 23.39  C  17 x 22 
A1  594 x 841  23.39 x 33.11  D  22 x 34 
A0  841 x 1189  33.11 x 46.81  E  34 x 44 
2A  1189 x 1681  46.81 x 66.22   
Metric Paper Sizes
The basic size of metric paper is one square meter, which is the area of an A0 sheet of metric paper. This size, taken along with the aspect ratio, fully determines the size and shape of metric reprographics paper.
For a given sheet size, United States paper is a little wider than metric paper in the short dimension, and a little shorter than metric paper in the long dimension.
As can be seen, A0 size folded once is A1 size, folded twice is A2 size, folded thrice is A3 size, and folded 4 times is A4 size.
Metric paper also has a B series of sizes for posters and wallcharts and a C series of sizes for envelopes.
Application examples
A0, A1  technical drawings, posters 
A2, A3  drawings, diagrams, large tables 
A4  letters, magazines, forms, catalogs, laser printer and copying machine output 
A5  note pads 
A6  postcards 
B5, A5, B6, A6  books 
C4, C5, C6  envelopes for A4 letters: unfolded (C4), folded once (C5), folded twice (C6) 
B4, A3  newspapers, supported by most copying machines in addition to A4 
B8, A8  playing cards 

