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ISO A Paper Sizes in CM & MM – Metric – and Inches – Imperial

ISO A Paper Sizes in CM & MM (Metric) and Inches (Imperial) – A0, A1, A2, A3, A4, A5 and A6

Have you ever had a brain freeze when someone asks for the size of A6 in mm, or even inches? Being asked a paper size is a common question creative designers and admin assistants get stuck on. This often results in quickly reaching for the phone / Google buddy.

You will find on this page the most common A sizes for reference. They are in a handy conversion table, both in cm, mm and inches, depending on how you like to work, imperial or metric.

Table of A Paper Sizes in CM & MM (Metric) and Inches (Imperial).
These are in portrait format, width by height – to get landscape simply reverse so the longest measurement is the width.

Size(W x H) in mm / Millimeters(W x H) in ” / Inches(W x H) in cm / Centimeters
A0841 x 1189 mm33.1 x 46.8 “84.1 x 118.9 cm
A1594 x 841 mm23.4 x 33.1 “59.4 x 84.1 cm
A2420 x 594 mm16.5 x 23.4 “42 x 59.4 cm
A3297 x 420 mm11.7 x 16.5 “29.7 x 42 cm
A4210 x 297 mm8.3 x 11.7 “21 x 29.7 cm
A5148 x 210 mm5.8 x 8.3 “14.8 x 21 cm
A6105 x 148 mm4.1 x 5.8 “10.5 x 14.8 cm
A774 x 105 mm2.9 x 4.1 “7.4 x 10.5 cm

Need some help to fill those blank A size pages with some creativity?

Feel free to contact us with your next creative brief.

A bit of further information on A paper sizes

The standard international paper size is also known as ISO format. It is controlled and agreed by the International Organization for Standardization. Standard sizes are applied to most printed items including posters, leaflets, and household printer paper, unless a special size is specified. In the US the equivalent of ISO A4 is known as US Letter – 215.9 x 279.4 mm / 8.5 x 11 inches.

Whats the point in ‘standard’ paper sizes?

  • Created conformity
  • Easy to understand
  • Universal amongst different countries
  • Cheaper for printers to produce using a ‘standard’ cutter size

Width by height, or the other way round?

Some customers ask for the ‘length and width’ of paper but I prefer to stick to referring to it as width and height. There’s a creative saying that goes “along the corridor and up the stairs” so you always start with width followed by height. That’s the process that has been a helpful way of reminding myself which to provide first and last when communicating with suppliers. Maybe don’t mention the bit about the stairs though, they might laugh at you lol.

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