UK Paper Sizes Guide: A0 to A10 Dimensions, Uses and Printing Tips

What paper sizes you need is dependent on what you’re printing: labels, business posters and coursework will each have different and specific sizing requirements. You wouldn’t expect to see an A4 movie poster or a postcard, for example.

• Paper Size Chart
• What is the Standard Paper Size?
• A Paper Sizes Explained
• What is A4 Paper Size?
• Large Paper Sizes: A0, A1 and A2 Explained
• Small Paper Sizes: A6, A7, A8, A9 and A10 Explained
• B Paper Sizes Explained
• C Paper Sizes and Envelopes
• Are UK Paper Sizes Different to US Paper Sizes?
• Which Paper Size Should I Use?

Paper Size Chart: A0 to A10 Dimensions

The ISO 216 (International Organization for Standardization) paper size system (e.g. A4) tells us that each size is half of the one that goes before it. In our paper size guide, we’ll tell you the measurements for paper sizes A0 – A10 (cm/mm/inches), what each size is typically used for and which printer paper sizes are best for office and home printing tasks.

Please Note: ‘Common uses’ are for guidance only. Specific products like business cards and postcards may use custom sizing.

What is the Standard Paper Size?

A4 (210 x 297mm or 8.3 x 11.7 inches) is the most common paper size in the UK. A4 is also the standard printer paper size.

• A4 in mm: 210 x 297mm
• A4 in cm: 21.0 x 29.7cm
• A4 in inches: 8.3 x 11.7 inches

A4-size paper is typically used for business printing, letters, invoices, forms, homework and coursework.

A Paper Sizes Explained

While A4 is the most common of these sizes, A3, A5 and more sizes are also available in this group.

Here’s an overview:

A0 is the largest A size in this guide

A1 is half of A0

A2 is half of A1

A3 is half of A2

A4 is half of A3

A5 is half of A4

A6 is half of A5

A7 is half of A6

A8 is half of A7

A9 is half of A8

A10 is half of A9

What is A4 Paper Size?

A4 measures 210 x 297mm, which is 8.3 x 11.7 in inches and 21.0 x 29.7 in cm. The standard printer paper size, it’s larger than A5, A6, A7, A8, A9 and A10. The sizes larger than A4 are A3, A2, A1 and A0. A4 size paper is half the size of A3 and double the size of A5. It’s also the default size for most home and office printing in the UK.

What is A4 Used For?

A4-size paper is used for letters, reports, invoices, cover documents, forms, schoolwork, magazines, office printing and catalogues.

Is A4 the Standard Printer Paper Size?

For most UK office and home printers, A4 is the standard paper size.

What is Half of A4?

A5

What is Double A4?

A3

What is A3 Paper Size?

A3-size paper measures 297 x 420mm, which is 29.7 x 42.0cm and 11.7 x 16.5 inches. A3 is double the size of A4 and larger than A5, A6, A7, A8, A9 and A10. A0, A1 and A2 meanwhile are all larger than A3, which is half the size of A2. A3-size paper is frequently used for leaflets, posters and calendars.

What’s A3 Paper Used For?

A3 paper is used for charts, menus, leaflets and calendars, as well as diagrams and drawings.

Can You Print A3 at Home?

While most home printers only print up to A4, A3 printing typically requires either an A3 printer or the use of professional print services.

What is A5 Paper Size?

A5 paper measures 148 x 210mm, 5.8 x 8.3 inches and 14.8 x 21.0cm. Half the size of A4, A5 is larger than A6, A7, A8, A9 and A10 sizes. A5-size paper is commonly used in leaflets, greetings cards, notebooks and invitations.

Can You Print With A5 Paper in a Standard Printer?

You may be able to adjust tray guides and choose A5 in the print settings.

Large Paper Sizes: A0, A1 and A2 Explained

What is A0 Paper Size?

A0 size measures 84.1 x 118.9cm, 841 x 1,189mm and 33.1 x 46.8 inches. It’s typically used for technical drawings, large posters, architectural plans, large-format artwork and exhibition graphics and usually needs a professional or large-format printer.

What is A1 Paper Size?

A1 paper is 59.4 x 84.1cm, 594 x 841mm and 23.4 x 33.1 inches. A1-size paper is used for posters, flipcharts, technical drawings, presentation materials and large diagrams.

What is A2 Paper Size?

A2-size paper measures 42.0 x 59.4cm, 420 x 594mm and 16.5 x 23.4 inches. A2 paper is larger than A3, which is half the size of A2. It’s used for medium posters, diagrams, architectural drawings, artwork and display graphics.

What Camera Resolution Do You Need for A0, A1 and A2 Prints?

When printing photo-quality large-format prints, image resolution is important. Generally, larger prints like A0, A1 and A2 require high-resolution image files, particularly if they’re going to be viewed up close.

Please Note: these suggestions are only approximate. Factors like image sharpness, viewing distance, compression and print finish will also affect your results.

Small Paper Sizes: A6, A7, A8, A9 and A10 Explained

What is A6 Paper Size?

A6 paper size measures 10.5 x 14.8cm, 105 x 148mm and 4.1 x 5.8 inches. A6 paper is half the size of A5 and is the standard postcard size in the UK. As well as postcards, A6-size paper is often used for invitations, greetings cards, small flyers and brochures and pocket-sized printed materials.

Can You Print A6 at Home?

While some printers can handle A6 paper, you may need to use custom settings in order to do so. Alternatively, you can use the manual feed or opt to get it printed professionally.

What is A7 Paper Size?

A7 paper measures 7.4 x 10.5cm, 74 x 105mm and 2.9 x 4.1 inches. It’s usually used for small cards, labels, tickets, large sticky-note style prints and professional print layouts.

Is A7 Too Small for Written Text?

Yes it is, it’s better suited to short notes, labels, cards or visual elements.

How Many A7 Sheets Fit on A4?

You can fit eight A7 sheets on one A4 sheet.

What is A8 Paper Size?

A8-size paper measures 5.2 x 7.4cm, 52 x 74mm and 2.0 x 2.9 inches. It’s used for small cards, business-card-style prints, bank-card-style prints, labels, mini inserts and vouchers. While an A4 sheet can fit multiple A8-sized designs, the exact number depends on margins, bleed and print layout.

What Are A9 and A10 Paper Sizes?

• A9: 37 x 52mm, 3.7 x 5.2cm, 1.5 x 2.0 inches
• A10: 26 x 37mm, 2.6 x 3.7cm, 1.0 x 1.5 inches

A9 paper is used for small tickets, vouchers, labels and mini cards. A10 paper is used for miniature inserts, stamps and tiny labels.

B Paper Sizes Explained

B sizes aren’t as common as A-size paper and are used for larger printing tasks such as posters, wall charts, design projects and large documents. They’re also used for passports, advertising materials and magazines.

C Paper Sizes and Envelopes

C-size paper is usually used for envelopes that are designed to fit A-size paper. Envelope sizes available include C4 (A4), C5 (A5) and DL (A4 sheet of paper folded into 3).

• C4 envelopes are capable of holding an A4 sheet of paper and measure 229 x 324mm.
• C5 envelopes will fit an A4 piece of paper that’s been folded in half and measure 162 x 229mm.

Other C Sizes

• C3 envelopes measure 324 x 458mm or 12.8 x 18 inches and are used to send A3 documents.
• C6 envelopes = 4.5 x 6.4 inches or 114 x 162mm.
• C7 envelopes = 81 x 114mm.

Are UK Paper Sizes Different to US Paper Sizes?

The UK uses the ISO 216 system, which includes A, B and C series paper sizes. The US uses sizes including Letter, Legal and Tabloid.

Please Note: If you’re planning to print US Letter documents on A4 paper, you may need to adjust print scaling.

Which Paper Size Should I Use?

Printing Different Paper Sizes at Home

Most home and office printers have A4 as the default.

Paper Sizing: Frequently Asked Questions

Paper at Cartridge People

Now you’ve got all the information you need to make the right choice for you when it comes to paper size, explore our comprehensive range of printer paper, which is available in a wide variety of sizes.

About The Author

Alice Brown

Alice is a Content Writer for Cartridge People with extensive experience in ecommerce copywriting. She has a background in printer consumables gained through her work on the Cartridge People blog. Alice holds both a Bachelor’s and a Master's degree from the University of Liverpool and is passionate about making printing easier for readers by writing helpful explainers on everything to do with printing.

All posts by Alice Brown