Paper sizes

### Paper sizes – compendium

Formaty.info is a complete guide to international paper sizes, their standards and dimensions; A, B, C and DL sizes in millimetres, inches and pixels.

### Chose the format you want

 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10
 DL letter legal

### Paper formats

A series of paper sizes is defined by ISO 2016.

The height divided by the width of all formats
of A, B and C series is the square root of two (1.4142)

### Interesting facts

• Format A0 has an area of one square meter.
• Format A1 is A0 cut into two equal pieces.
In other words, the height of A1 is the width of A0.
• Dimensions of B formats are geometric mean of two intermediate A dimensions. Dimensions of B2 sides are geometric mean of A2 and A1 sides.
• Dimensions of C format are geometric mean of appropriate A and B dimensions, i.e. C2 format is geometric mean of A2 and B2.

#### Series of C formats is mainly intended for envelopes.

Their numbering indicates what type of paper of A format can be put in a given envelope without folding, for example, A4 paper fits the C4 envelope without folding.

 EN
Paper sizes

### Paper sizes – compendium

Formaty.info is a complete guide to international paper sizes, their standards and dimensions; A, B, C and DL sizes in millimetres, inches and pixels.

### Chose the format you want

A
B
C
L
 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10
 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10
 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10
 DL letter letter

### Paper formats

A series of paper sizes is defined by ISO 2016.

The height divided by the width of all formats of A, B and C series is the square root of two (1.4142)

### Interesting facts

• Format A0 has an area of one square meter.
• Format A1 is A0 cut into two equal pieces.
In other words, the height of A1 is the width of A0.
• Dimensions of B formats are geometric mean of two intermediate A dimensions. Dimensions of B2 sides are geometric mean of A2 and A1 sides.
• Dimensions of C format are geometric mean of appropriate A and B dimensions, i.e. C2 format is geometric mean of A2 and B2.

#### Series of C formats is mainly intended for envelopes.

Their numbering indicates what type of paper of A format can be put in a given envelope without folding, for example, A4 paper fits the C4 envelope without folding.