### A Series Paper Sizes – Quick Lookup

Select the standard paper size from the ‘Size’ selector and the unit from the ‘Unit’ selector – the dimensions will be shown in the dimensions box.

The dimensions of the A series paper sizes, as defined by the ISO 216 standard, are given in the table to the right of the diagram in both millimetres and inches (cm measurements can be obtained by dividing mm value by 10). The A Series paper size chart, below left, gives a visual representation of how the sizes relate to each other – for example A5 is half of A4 size paper and A2 is half of A1 size paper.

### Table of Paper Sizes From 4A to A10

Size | Width x Height (mm) | Width x Height (in) |

4A0 | 1682 x 2378 mm | 66.2 x 93.6 in |

2A0 | 1189 x 1682 mm | 46.8 x 66.2 in |

A0 | 841 x 1189 mm | 33.1 x 46.8 in |

A1 | 594 x 841 mm | 23.4 x 33.1 in |

A2 | 420 x 594 mm | 16.5 x 23.4 in |

A3 | 297 x 420 mm | 11.7 x 16.5 in |

A4 | 210 x 297 mm | 8.3 x 11.7 in |

A5 | 148 x 210 mm | 5.8 x 8.3 in |

A6 | 105 x 148 mm | 4.1 x 5.8 in |

A7 | 74 x 105 mm | 2.9 x 4.1 in |

A8 | 52 x 74 mm | 2.0 x 2.9 in |

A9 | 37 x 52 mm | 1.5 x 2.0 in |

A10 | 26 x 37 mm | 1.0 x 1.5 in |

To obtain paper sizes in centimetres, convert mm values to cm by dividing by 10 and in feet by dividing inch values by 12.

### US Paper Sizes – Quick Lookup

Select the paper size from the ‘Size’ selector and the unit from the ‘Unit’ selector – the dimensions will be shown in the dimensions box.

### USA 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 ANSI 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 |

Letter | 216 x 279 mm | 8.5 x 11.0 in | 1:1.2941 |

Legal | 216 x 356 mm | 8.5 x 14.0 in | 1:1.6471 |

Junior Legal | 127 x 203 mm | 5.0 x 8.0 in | 1:1.6000 |

Ledger / Tabloid | 279 x 432 mm | 11.0 x 17.0 in | 1:1.5455 |

### 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.

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 | Nearest ISO |

A | 216 x 279 mm | 8.5 x 11.0 in | 1:1.2941 | A4 |

B | 279 x 432 mm | 11.0 x 17.0 in | 1:1.5455 | A3 |

C | 432 x 559 mm | 17.0 x 22.0 in | 1:1.2941 | A2 |

D | 559 x 864 mm | 22.0 x 34.0 in | 1:1.5455 | A1 |

E | 864 x 1118 mm | 34.0 x 44.0 in | 1:1.2941 | A0 |

### B+ (Super B)

B Plus, or Super B as it is sometimes known, has dimensions of 13″ x 19″ (329mm x 483mm). This size is the ANSI B size with a 1″ margin for print bleed all the way round. It is sometimes known as A3+ or Super A3 in countries that use ISO 216 paper sizes.

### 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 | 4:3 |

Arch B | 305 x 457 mm | 12.0 x 18.0 in | 3:2 |

Arch C | 457 x 610 mm | 18.0 x 24.0 in | 4:3 |

Arch D | 610 x 914 mm | 24.0 x 36.0 in | 3:2 |

Arch E | 914 x 1219 mm | 36.0 x 48.0 in | 4:3 |

Arch E1 | 762 x 1067 mm | 30.0 x 42.0 in | 7:5 |