A Guide to Paper Sizes

What size is A4 paper? And A3 and A5 and A0 for that matter! The most common paper sizes used in the UK for printing and stationery are named using the letter A, also known as International Paper Sizes. The range begins with tiny A10 (37mm x 26mm) and goes all the way through to the mighty A0 (1189mm x 841mm).

With A sized paper, however many times you double the short edge or half the long edge, it will always have the same width to height ratio. For example, the dimensions of A4 paper are 210x297mm, and half of A4 equals A5, and double A4 equals A3.

Starting from A0, all subsequent A paper sizes are determined by halving the paper on its longest size. A0 halves to become A1, which halves to become A2, all the way down to A10. Remember, the length of the smaller size is always equal to the width of the larger size. For example, the length of A4 is 297mm which is also the width of A3.

To many people wordwide, excluding North America and Canada, the most familiar paper size size is A4 (a familiar 210mm x 297mm). It is commonly used for letters and correspondence in the UK and it is the standard paper size for most home printers. I bet you’ve seen, used and/or scribbled on at least one piece of this today.

At Printroom Group we print on sizes from A5 to A0, both unbound and with various binding types (as well as custom size printing if that’s what you’re looking for).

We offer more relevant products please visit our Home Page

If you are looking for posters, Document Printing or any other cost-effective printing visit our sister site www.morethanjustprint.co.uk

We have Document printing, A1 Poster Printing, A2 poster printing, A0 poster printing as well as small format printed posters, A4 and A3 poster printing. And when you visit More Than Just Print you can enjoy a £5.00 Discount on your printing when you join our mailing list!

Paper Sizes and Types: Buying Guide

In the office, at home or at school, printer paper is one of the essentials that we can no longer do without. It remains to be seen which one to use depending on the use you plan to make of it. We will not choose the same size or the same quality of paper for an internal memo, photocopies for your students, an outdoor poster or the cover of a brochure to send to a client. JPG has put together all the information you need to better understand paper sizes and types in this guide.


what size is a4
what size is a4


Know everything before buying your paper

The first question to ask yourself concerns the target, that is to say the person for whom the document you are preparing is intended. The answer will determine the level of quality needed and the paper size. For a simple internal memo, normal 80 gram A4 size paper will be more than enough, while you will probably prefer heavier paper for a flyer to promote your business, a large glossy A3 sheet for a poster. advertising material, or even card stock in A8 format for quality business cards. Finally, especially if the target audience is sensitive to it or if you take your company’s ecological responsibility seriously, consider using recycled paper., which today exists in grammages, finishes and sizes as varied as traditional paper.


Paper Before printing

To avoid unpleasant surprises, it is strongly recommended that you decide on the size and resolution of your document before you even start preparing it on the computer.


Paper Resolution 

We express a resolution in dpi (dots per inch, or dots per inch in English). The two main resolutions used are as follows:


HR / 300 dpi: high resolution (for quality documents with photos or graphics)

BR / 72 dpi: low resolution (for text or possibly for graphics for internal use)


Paper Margins

Also remember to include a bleed margin, i.e. an area of ​​between 2 and 5 millimetres around the template, which will be cut off and will not normally appear on the printed document (it is used to avoid areas of white which could interfere around the document), as well as to take into account the technical margin (that is to say a space of a few millimetres in which you will not integrate any element except the color or image of bottom) which is used to compensate for a possible cutting offset.


Ecological paper

Whether it’s for the sake of the environment, to meet your ISO goals, or as part of an advertising campaign focused on recycling, eco-friendly 

Paper can be a good choice. It comes at three levels:

Paper from controlled forests: if the result is not that different from your usual paper, it is produced in sustainably managed forests. Recycled paper: Made from recycled fibers, it does not offer the same level of whiteness as virgin paper, which can be a wise choice if your business is keen to showcase its environmental commitment to its customers. Mixed paper: by adding virgin fibres from controlled forests to recycled fibres, we obtain a paper whose quality is equivalent to your usual paper while preserving the environment. To describe the thickness and the quality feel of a sheet of paper, we speak of its gram-mage, that is to say the mass (in grams) of a sheet of 1 square meter. The higher the basis weight, the heavier, thicker and stronger the sheet will be. For photocopy paper, we will generally choose light and inexpensive sheets of 80 gsm in A4 size (dimensions 21 cm by 29.7 cm), whereas a magazine cover will require a gram-mage of at least 170 gsm and a size of A3 paper.

List of the different gram-mages available and their uses:


Paper Weight Use

  • 80 – 100 gsm Internal or temporary documents, preferably containing only text (memos, photocopies, fax)
  • 110 – 120gsm Letterhead or external correspondence.
  • 130 -170gsm More durable paper generally reserved for printing brochures or flyers.
  • 170 – 200gsm From 170 gsm, we talk about cardboard sheet.
    This paper can for example be used for the cover of a magazine or a brochure, or
    for the printing of two-sided booklets.
  • 200 – 250gsm The usual grammage of postcards. It can also be used to create an excellent quality blanket.
  • 300 – 400gsm We enter the category of cardboard boxes. Ideal for business cards or for a book or magazine cover
    (be careful to
    adapt the binding).
  • 400gsm and above To create luxury business cards.




Appellation Description

Shiny Also called “glossy paper”, it is mostly used for printing photos. For the pages of a magazine,

glossy coated paper is used .

Mast Without the above shine effect, matte paper will stand up to repeated handling and fingerprints better.

Layer The coated paper is the result of the printer’s work and has a better look, feel and colors.


Paper sizes and formats


It is of course possible to express the size of a sheet of paper in pixels, but note however that the result will vary widely depending on the resolution of your screen, and this is why it is recommended that novices consult the dimensions instead. metric. Especially since the paper format from A0 to A10 has the advantage of always keeping its proportions. In other words, the length of a sheet Ax will always be equal to the width of A (x + 1), while the width of Ax will always equal the length of A (x-1). For example, just fold an A1 size sheet in half to get A2 size paper.

The largest standardized printing format is the A0 format (dimensions 118.9 x 84.1 cm), used in particular for on-site communication (kakemonos, posters). The paper formats A1 (dimensions 84.1 x 59.4 cm) and A2 (dimensions 59.4 x 42 cm) are also used for advertising communication but also for architectural plans. A4 (dimensions 29.7 x 21 cm) and A3 (dimensions 42 x 29.7 cm) are the most common and compatible with most printers and photocopiers. A5 paper (dimensions 21 x 14.8 cm) is used in particular for printing advertising brochures. Finally, A6 is the standard size for photo paper, A7 is for printing menus or small advertising documents, A8 is the size of playing cards or business cards, and A9 is the size of self-adhesive labels.


Paper size A


Dimensions in millimetres Length x Width (mm) Dimensions in centimetres

Length x Width



Size in pixels Length x Width (px)



A0 paper size 1189 x 841 mm 118.9 x 84.1 cm HR – 14043 x 9933px

BR – 3370 x 2384px


A1 paper dimensions 841 x 594 mm 84.1 x 59.4 cm HR – 9933 x 7016px

BR – 2384 x 1684px


A2 paper size

594 x 420 mm 59.4 x 42 cm HR – 7016 x 4961px

BR – 1648 x 1191px


A3 paper dimensions

420 x 297 mm 42 x 29.7 cm HR – 4961 x 3508px

BR – 1191 x 842px


A4 paper dimensions

297 x 210 mm 29.7 x 21 cm HR – 3508 x 2480px

BR – 842 x 595px


A5 paper dimensions

210 x 148 mm 21 x 14.8 cm HR – 2480 x 1748px

BR – 595 x 420px


A6 paper size

148 x 105 mm 14.8 x 10.5 cm HR – 1748 x 1240px

BR – 420 x 298px


A7 paper size

105 x 74 mm 10.5 x 7.4 cm HR – 1240 x 874px

BR – 298 x 210px


A8 paper size

74 x 52 mm 7.4 x 5.2 cm HR – 874 x 614px

BR – 210 x 147px


A9 paper size

52 x 37 mm 5.2 x 3.7 cm HR – 614 x 437px

BR – 147 x 105px


A10 paper size

37 x 26 mm 3.7 x 2.5 cm HR – 437 x 307px

BR – 105 x 74px

Paper size B


Less common on a daily basis, B-format paper is used by professional printers, for books, brochures, passports, etc. For an equivalent figure, a B-format sheet of paper will be slightly larger than its A-series counterpart.


Dimensions in millimetres

Width x Length (mm)


Dimensions in centimetres

Width x Length


Paper Dimensions


Dimensions in pixels

Width x Length (px)


B0 paper dimensions 1000 x 1414 mm 100 x 141.4 cm HR – 11811 x 16701px

BR – 2835 x 4008px


B1 paper dimensions 707 x 1000 mm 70.7 x 100.0 cm HR – 8350 x 11811px

BR – 2004 x 2835px


B2 paper dimensions 500 x 707 mm 50.0 x 70.7 cm HR – 5906 x 8350px

BR – 1417 x 2004px


B3 paper dimensions 353 x 500 mm 35.3 x 50.0 cm HR – 4169 x 5906px

BR – 1001 x 1417px


B4 paper dimensions 250 x 353 mm 25.0 x 35.3 cm HR – 2953 x 4169px

BR – 709 x 1001px


B5 paper dimensions 176 x 250 mm 17.6 x 25.0 cm HR – 2079 x 2953px

BR – 499 x 709px


B6 paper dimensions 125 x 176 mm 12.5 x 17.6 cm HR – 1476 x 2079px

BR – 354 x 499px


B7 paper dimensions 88 x 125 mm 8.8 x 12.5 cm HR – 1039 x 1476px

BR – 249 x 354px


B8 paper dimensions 62 x 88 mm 6.2 x 8.8 cm HR – 732 x 1039px

BR – 176 x 249px


B9 paper dimensions 44 x 62 mm 4.4 x 6.2 cm HR – 520 x 732px

BR – 125 x 176px


B10 paper dimensions 31 x 44 mm 3.1 x 4.4 cm HR – 366 x 520px

BR – 88 x 125px


Paper dimensions C

C0 to C10 size paper is more common than you might think: it is indeed the equivalent envelope to the sheet of paper with the same number. A C5 envelope will, for example, perfectly contain an A5 sheet. And as if by magic, a C5 sheet is the perfect size to send in a B5 envelope.


Dimensions in millimetres

Width x Length 

(mm) Dimensions in centimetres

Width x Length



C0 paper dimensions 917 x 1297 mm 91.7 x 129.7 cm

C1 paper dimensions 648 X 917 mm 64.8 x 91.7 cm

C2 paper dimensions 458 x 648 mm 45.8 x 64.8 cm

C3 paper dimensions 324 x 458 mm 32.4 x 45.8 cm

C4 paper dimensions 229 x 324 mm 22.9 x 32.4 cm

C5 paper dimensions 162 x 229 mm 16.2 x 22.9 cm

C6 paper dimensions 114 x 162 mm 11.4 x 16.2 cm

C7 paper dimensions 81 x 114 mm 8.1 x 11.4 cm

C8 paper dimensions 57 x 81 mm 5.7 x 8.1 cm

C9 paper dimensions 40 x 57 mm 4.0 x 5.7 cm

C10 paper dimensions 28 x 40 mm 2.8 x 4.0 cm

To summarize, we have gathered here the list of documents most frequently printed in the office or at your printer and the corresponding paper type.


Product Weight Paper size Finish

Standard document (memo, photocopy, fax) 80 – 100gsm A4 Mast

Correspondence, report, document intended for a client 110 – 120gsm A4 Mast

Magazine 170 – 200gsm A4 / A5 Glossy coated

Business cards 300 – 400gsm AT 8 Mast

Leaflets, restaurant menus, brochures and flyers 130 -170gsm AT 5 Shiny

Brochure covers and reports 200-250gsm A4 / A5 Matt or glossy, textured

Posters or posters 130 -170gsm A0-A1, B0-B2 Glossy coated

Books 130 -170gsm A4-A6, B3-B5 Velvet

Envelopes 110 – 120gsm Any C size Mast


For more details on A4 printing visit our News section on www.morethanjustprint.co.uk