ISO paper and card sizing

ISO paper format

The dimensions of the A series paper sizes is defined by the ISO 216 standard. Each size moves by a half. For example A5 is half of A4 size paper and A2 is half of A1 size paper.

Poly bags,grip seal bags and polypropylene bags have a 2-3mm size variation so choose a bag which is at least 5mm bigger than required.

The following table gives the dimensions of A series paper sizes in inches and millimeters. It can be used to select the size of bag required to fit a common paper size. All bag dimensions on the website have been listed in millimeters.

A Series Formats
ISO size Size
A0 841 x 1189mm
33 x 46.75"
A1 594 x 841mm
23.375 x 33"
A2 420 x 594mm
16.5 x 23.375"
A3 297 x 420mm
11.75 x 16.5"
A4 210 x 297mm
8.25 x 11.75"
A5 148 x 210mm
5.875 x 8.25"
A6 105 x 148mm
4.125 x 5.875"
A7 74 x 105mm
2.875 x 4.125"
A8 52 x 74mm
2 x 2.875"
A9 37 x 52mm
1.5 x 2"
A10 26 x 37mm
1 x 1.5"

The ISO standard paper size system covers a wide range of formats but not all of them are widely used in practice. Among all formats, A4 is clearly the most important one for daily office use.

Some main applications of the most popular formats can be summarized as:

ISO size Typical usage
A0, A1 Technical drawings, posters
A1, A2 Flip charts
A2, A3 Drawings, diagrams, large tables
A4 Letters, magazines, forms, catalogs, laser printer and copying machine output
A5 Notepads
A6 Postcards
A5, A6 Books
A3 Newspapers, supported by most copying machines in addition to A4
A8 Playing cards
B Series Formats
ISO size Size
B0 39.375 x 55.75"
B1 27.75 x 39.375"
B2 19.75 x 27.75"
B3 13.875 x 19.75"
B4 9.875 x 13.875"
B5 7 x 9.875"
B6 4.875 x 7"
B7 3.5 x 4.875"
B8 2.5 x 3.5"
B9 1.75 x 2.5"
B10 1.25 x 1.75"
C Series Formats
ISO size Size
C0 36 x 51"
C1 25.5 x 36"
C2 18 x 25.5"
C3 12.75 x 18"
C4 9 x 12.75"
C5 6.375 x 9"
C6 4.5 x 6.375"
C7 3.188 x 4.5"
C8 2.25 x 3.188"
C9 1.625 x 2.25"
C10 1.125 x 1.625"

Common paper card sizes

The following table gives the dimension of common paper card sizes. It can be used to select the size of bag required to fit a common card size.

Poly bags,grip seal bags and polypropylene bags have a 2 to 3mm size variation so choose a bag which is at least 5mm bigger than required.

Paper card sizing
Card size Size
C7 3.5 x 6"
C6 5 x 7"
C5 9 x 13"

ISO paper and card sizing last updated: Mar-2023

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