Paper formats: standard sizes and typical uses

We bet that in your office there are reams of A4  in the printer and at least one A5 sheet full of notes somewhere on your desk. If you’re familiar with paper formats, you’ll have probably guessed that we’re talking about printer paper and notepads.

The list of paper formats is long and, to be honest, not terribly interesting. It’s all about numbers! In this post we want to present it in a more practical and, we hope, useful ‘format’. Sure, we’ll talk about paper sizes, but we’ll also look at their most common uses: posters, leaflets, brochures, postcards, books, business cards and more.

ISO 216 paper formats: a quick word about the standard

Let’s start with the most boring bit: the ISO 216 standard that classifies different paper formats based on the sheet’s dimensions to create an international standard. This allows all European countries (in the United States and Canada the Letter format rules) to speak the same language, at least as far as paper formats are concerned.

According to the standard, formats are generated by subdividing an initial sheet without leaving any waste material. In the A series, the most common, this great ancestor is the A0 sheet, which can be folded and cut to create all the other formats in the series. How is it folded? We’re not going to explain here, because then things would get really boring. Because, at the end of the day, you just want to know which paper format is best for your project, right?

In the A series, the ‘primary’ range, there are 10 subgroups: they go from A0, the largest format, to A10, the smallest. Alongside the A series are the ‘subsidiary’ B and C series, which are also denoted by numbers. What do ‘primary’ and ‘subsidiary’ mean? They mean that a letter written on an A4 sheet can be placed inside a C4 envelope, while a C4 envelope can be placed inside a B4 envelope. This is because a C4 sheet is slightly wider than A4 while B4 is slightly wider than C4.

If you’ve hung out in the publishing world, you will have heard of the B series, which goes from B0 (1000 x 1414 mm) to B10 (31 x 44 mm). In fact, B5 (176 x 250 mm) is a great format for books. B0 (1000 x 1414 mm), B1 (707 x 1000 mm) and B2 (500 x 707 mm), given their large sizes, are a good choice for printing posters or office presentations. And the C series, which goes from C0 (917 x 1297 mm) to C10 (28 x 40 mm), is the perfect ‘supplementary’ range, since it’s mainly used for creating envelopes.

A series. Formats, dimensions and uses.

Below you’ll find the dimensions and possible uses for each format. We say ‘possible’ because there are no rules that say a project must use a specific sheet size. There are, however, conventions. When you think of a postcard, for example, in your mind you see an A6 format. But there’s nothing to stop you from doing something different. You could, for instance, create a postcard of Lisbon in the shape of a sardine. But you would have to be willing to waste paper and pay steep printing costs given that we’re talking about a custom format in the shape of a… sardine! 😉

A0 format. Dimensions: 841 x 1189 mm.

This is the biggest format of all. Its large size means it’s only used by copy shops and designers, and the same goes for A1 and A2. A0 is mainly used for technical drawing, which requires sheets that are large enough for a design to fit comfortably, without having to use a magnifying glass. It can also be used for posters, although the most widely used formats for these are 700 x 1000 mm and 1000 x 1400 mm.

A1 format. Dimensions: 594 x 841 mm.

A1, which is also pretty large, is used for technical drawing too, as well as for maps, posters and other large-format advertising materials.

A2 format. Dimensions: 420 x 594 mm.

Applications for the A2 format are varied: from drawing to printing photos; from posters to charts; from large wall calendars to flipcharts.

A3 format. Dimensions: 297 x 420 mm.

Along with A4, this is undoubtedly one of the most common sizes. It’s therefore no surprise that most office printers can take A3 as well as A4. So, what’s it used for? It’s used to print drawings, artwork, posters, photos, magazines, musical scores, certificates and more. It’s also the perfect format for promotional leaflets (folded 6 ways): its generous size allows you to present a map of a convention centre or a many-branched diagram.

A4 format. Dimensions: 210 x 297 mm.

Everyone, even the uninitiated, knows that A4 is the classic paper size for printers and as such it is used for standard documents from letters to forms. It’s the format of school notepads, children’s books, encyclopaedias (which need more space for illustrations), magazines and leaflets. Indeed, the classic leaflet format is an A4 sheet folded in three.

A5 format. Dimensions: 148 x 210 mm.

The A5 format is also widely used. We started this article by saying that there would likely be an A5 notepad on your desk. A5 is in fact the perfect format for notebooks: it’s less bulky than A4, practical for taking notes and doesn’t take up too much space in a backpack. For the same reason, A5 can also be great for printing books, as well as magazines, leaflets and flyers.

A6 format. Dimensions: 105 x 148 mm.

You’re bound to be familiar with this format too, especially if you’re still in the habit of sending postcards from holiday destinations or accompanying gifts with a greetings card. Postcards and greetings cards generally come in A6 format. What’s more, the size of an A6 sheet is also perfect for printing leaflets and pocket diaries and books.

A7 format. Dimensions: 74 x 105 mm.

Given its compact dimensions, A7 can be used to create, for example, a mini calendar with the timetable for classes at a gym or school, as well as flyers or greetings cards.

A8 format. Dimensions: 52 x 74 mm.

To give you an idea of the A8 format, just look inside your wallet: business cards and loyalty cards are usually in a similar but slightly larger format (85 x 55 mm). So, there’s nothing to stop you from using this standard format for business cards, mini greetings cards, stickers or labels.

The table below  summarises the dimensions of different formats in the A series.  Dimensions are given in millimetres, centimetres, inches and pixels.

	Dimensions in millimetres Height x Width (mm)	Dimensions in centimetres Height x Width (cm)	Dimensions in inches Height x Width (in)	Dimensions in pixels Height x Width (px)
A0 paper format	1189 x 841 mm	118.9 x 84.1 cm	46.8 x 33.1 in	HR – 14043 x 9933px LR – 3370 x 2384px
A1 paper format	841 x 594 mm	84.1 x 59.4 cm	33.1 x 23.4 in	HR – 9933 x 7016px LR – 2384 x 1684px
A2 paper format	594 x 420 mm	59.4 x 42 cm	23.4 x 16.5 in	HR – 7016 x 4961px LR – 1648 x 1191px
A3 paper format	420 x 297 mm	42 x 29.7 cm	16.5 x 11.7 in	HR – 4961 x 3508px LR – 1191 x 842px
A4 paper format	297 x 210 mm	29.7 x 21 cm	11.7 x 8.3 in	HR – 3508 x 2480px LR – 842 x 595px
A5 paper format	210 x 148 mm	21 x 14.8 cm	8.3 x 5.8 in	HR – 2480 x 1748px LR – 595 x 420px
A6 paper format	148 x 105 mm	14.8 x 10.5 cm	5.8 x 4.1 in	HR – 1748 x 1240px LR – 420 x 298px
A7 paper format	105 x 74 mm	10.5 x 7.4 cm	4.1 x 2.9 in	HR – 1240 x 874px LR – 298 x 210px
A8 paper format	74 x 52 mm	7.4 x 5.2 cm	2.9 x 2.0 in	HR – 874 x 614px LR – 210 x 147px

A9 paper format	52 x 37 mm	5.2 x 3.7 cm	2.0 x 1.5 in	HR – 614 x 437px LR – 147 x 105px
A10 paper format	37 x 26 mm	3.7 x 2.5 cm	1.5 x 1.0 in	HR – 437 x 307px LR – 105 x 74px

B series. Formats, dimensions and uses.

Used far less in everyday life, B series paper is employed by professional printers  to produce books, brochures, passports and more… The main difference compared to A series? A piece of B format paper will be slightly bigger than its A format equivalent with the same number.

Below is a summary table with the dimensions in millimetres, centimetres, inches and pixels for the various B series formats.

	Dimensions in millimetres Width x height (mm)	Dimensions in centimetres Width x height (cm)	Dimensions in inches Width x height (in)	Dimensions in pixels Width x height (px)
B0 paper format	1000 x 1414 mm	100 x 141.4 cm	39.4 x 55.7 in	HR – 11811 x 16701px LR – 2835 x 4008px
B1 paper format	707 x 1000 mm	70.7 x 100.0 cm	27.8 x 39.4 in	HR – 8350 x 11811px LR – 2004 x 2835px
B2 paper format	500 x 707 mm	50.0 x 70.7 cm	19.7 x 27.8 in	HR – 5906 x 8350px LR – 1417 x 2004px
B3 paper format	353 x 500 mm	35.3 x 50.0 cm	13.9 x 19.7 in	HR – 4169 x 5906px LR – 1001 x 1417px
B4 paper format	250 x 353 mm	25.0 x 35.3 cm	9.8 x 13.9 in	HR – 2953 x 4169px LR – 709 x 1001px
B5 paper format	176 x 250 mm	17.6 x 25.0 cm	6.9 x 9.8 in	HR – 2079 x 2953px LR – 499 x 709px
B6 paper format	125 x 176 mm	12.5 x 17.6 cm	4.9 x 6.9 in	HR – 1476 x 2079px LR – 354 x 499px
B7 paper format	88 x 125 mm	8.8 x 12.5 cm	3.5 x 4.9 in	HR – 1039 x 1476px LR – 249 x 354px
B8 paper format	62 x 88 mm	6.2 x 8.8 cm	2.4 x 3.5 in	HR – 732 x 1039px LR – 176 x 249px

B9 paper format

44 x 62 mm

4.4 x 6.2 cm

1.7 x 2.4 in

HR – 520 x 732px LR – 125 x 176px

B10 paper format

31 x 44 mm

3.1 x 4.4 cm

1.2 x 1.7 in

HR – 366 x 520px LR – 88 x 125px

C series. Formats, dimensions and uses.

C series paper formats are used more often than you might think.

They’re employed for the production of envelopes for letters. Indeed, if you think about it, an A4 sheet of paper will fit a C4 format envelope exactly. Likewise, a sheet of C5 paper will fit a B5 envelope exactly. So the C series is a “complementary” series designed to fit paper formats from the other two series.

Below is a summary table with the dimensions in millimetres, centimetres and inches for the various C series formats.

	Dimensions in millimetres Width x height (mm)	Dimensions in centimetres Width x height (cm)	Dimensions in inches Width x height (in)
C0 paper format	917 x 1297 mm	91.7 x 129.7 cm	36.1 x 51.5 in
C1 paper format	648 x 917 mm	64.8 x 91.7 cm	25.5 x 36.1 in
C2 paper format	458 x 648 mm	45.8 x 64.8 cm	18.0 x 25.5 in
C3 paper format	324 x 458 mm	32.4 x 45.8 cm	12.8 x 18.0 in
C4 paper format	229 x 324 mm	22.9×32.4 cm	9.0 x 12.8 in
C5 paper format	162 x 229 mm	16.2 x 22.9 cm	6.4 x 9.0 in
C6 paper format	114 x 162 mm	11.4 x 16.2 cm	4.5 x 6.4 in
C7 paper format	81 x 114 mm	8.1 x 11.4 cm	3.2 x 4.5 in
C8 paper format	57 x 81 mm	5.7 x 8.1 cm	2.2 x 3.2 in

C9 paper format	40 x 57 mm	4.0 x 5.7 cm	1.6 x 2.2 in
C10 paper format	28 x 40 mm	2.8 x 4.0 cm	1.1 x 1.6 in

As mentioned earlier, this is just a set of general rules. Feel free to break them!