A Paper, Custom Size & Resolution Printing Help Guide

Not sure of the size you need? We've made this handy page to help you

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A Series Paper Sizes

Standard A series paper is standardised under ISO 216, as such it provides set guidelines for the sizes of paper.

ISO paper sizes are all based on a single aspect ratio of the square root of 2, or approximately 1:1.4142.

Each increase in A paper size is double the previous, for example, looking at the size guide image you can see that an A3 print is double the size of A4, or, alternatively, you can fit two A4 prints within an A3 sized print.

You can use this site for further help, as well as details of other international standard paper sizes.

A Paper Size Guide
A Paper Size Width × Height (mm) Width × Height (in)
A0 841 × 1189 mm 33.1 × 46.8 in
A1 594 × 841 mm 23.4 × 33.1 in
A2 420 × 594 mm 16.5 × 23.4 in
A3 297 × 420 mm 11.7 × 16.5 in
A4 210 × 297 mm 8.3 × 11.7 in
A Paper Size Guide A Paper Size Guide

How does this help me?

With the technical details out of the way, this A paper standard basically helps you understand that to have your artwork printed correctly to a specific A paper size it must be of the correct dimensions, size and ratio.

As we don't make any adjustments or alterations to artwork (such as cropping or adding/removing of white borders) except for uniform scaling to fit within your ordered size, you may find that your final print could be shorter or narrower than you expected.

You will probably prefer to use exact units of measurement, such as millimetres or inches, to create your artwork. Nearly all image editing software allows you to set the specific size of the artwork.

The A Paper Size Guide Table on this page has the most common A paper sizes for you to use when creating or editing your artwork.

Custom Size Printing

Of course, we can print different sizes to the standard A paper range, our printers can accommodate any width poster up to 1.5m and any length up to 30m.

If ordering a custom size online you will need to choose the paper size that your artwork will fit in to.

For example, if you wish to order a 50 x 70cm print this would fit in to an A1 print size as A1 is 59.4cm x 84.1cm.

You then add in the Order Notes the specific size you want your artwork printed at, ensuring your artwork matches your requested print dimensions.

If you have several artworks in an order you will need to identify which of the artworks are to be printed at specific sizes.

If ordering by email we ask you clearly list your requirements, eg:

  • Artwork1.JPG - 2 x 50x70 cm Premium Matte
  • Artwork2.PDF - 1 x 50x50 cm Premium Satin

This helps us to more quickly calculate your order and check your attached artwork matches your order requirements.

To send us large artwork files we recommend using WeTransfer which allows you to send us multiple files quickly and easily.

We have a guide here to help you using WeTransfer.

Artwork Resolution

To get the best print your artwork should be 300 DPI (dots per inch).

This helps to ensure that the final print is not pixelated or lacking in detail.

For some applications, such as Outdoor PVC Banners, which will be viewed from several metres away, the DPI can be lower, such as 150 DPI.

Where possible we recommend using vector based artwork, vectors are resolution independent and can scale in size infinitely without loss of detail. Typically vector artwork will come in PDF format, although PDF can still have raster based resolution dependent images within it.

Typically, photographs or scans are raster based, and will be in JPG, PNG or TIFF format. These have a set resolution and size and will become pixelated if printed too large.

You can calculate your artworks DPI by using this site and entering the horizontal and vertical dimensions.

We always inspect artwork before printing and will let you know if we think there may be any issues with your artwork.


If you are looking to print larger than A0 or if you have any queries regarding your artwork and print sizes then please contact us by phone on 020 3005 4495, email us, or use our Live Chat.

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