Poster Paper Size Guide

Poster Paper Size Guide

If you're ordering signage and posters, you might be wondering about what the standard UK paper sizes are. We've created this handy paper size guide to help answer your questions about all the different paper sizes available.

UK paper sizes chart - metric paper sizes - ‘A’ series

UK paper size chart
Paper size Milimetres Centimetres Inches
A0 841 x 1189 mm 84.1 x 118.9 cm 33.1 x 46.8 inches
A1 594 x 841 mm 59.4 x 84.1 cm 23.4 x 33.1 inches
A2 420 x 594 mm 42 x 59.4 cm 16.5 x 23.4 inches
A3 297 x 420 mm 29.7 x 42 cm 11.7 x 16.5 inches
A4 210 x 297 mm 21 x 29.7 cm 8.3 x 11.7 inches
1/3 A4 99 x 210 mm 9.9 x 21 cm 1.0 x 1.5 inches
A5 148.5 x 210 mm 14.85 x 21 cm 5.8 x 8.3 inches
A6 105 x 148.5 mm 10.5 x 14.85 cm 4.1 x 5.8 inches
A7 74 x 105 mm 7.4 x 10.5 cm 2.9 x 4.1 inches
A8 52 x 74 mm 5.2 x 7.4 cm 2.0 x 2.9 inches
A9 37 x 52 mm 3.7 x 5.2 cm 1.5 x 2.0 inches
A10 26 x 37mm 2.6 x 3.7cm 1.0 x 1.5 inches

In A paper sizes, a higher number indicates a smaller size, with A10 being the smallest and A0 being the largest.

An easy way to understand how A-series paper sizing works, is that each size is exactly half the size of the next largest. This means that two A4 sheets fit into an A3 sheet, two A3 sheets fit into an A2 sheet, and so on.

UK paper sizes comparison chart
A Paper Sizes Comparison Chart

1/3 A4 and DL paper size explained

If you fold a piece of A4 paper into three, this gives you 1/3 A4 (or, one-third A4) size. This is why it's also commonly called trifold size paper, often used for leaflets.

This size is also often referred to as DL size. Confusingly, however, these aren't exactly the same size. DL size is 110mm x 210mm, whereas 1/3 A4 is actually 99mm x 210mm. A key benefit is that 1/3 A4 leaflets and letters will easily fit into DL envelopes.

Imperial paper sizes

There is also a huge range of traditional English paper sizes, known as Imperial. We stock a number of poster holders designed for some of the larger Imperial poster sizes.

Paper size Milimetres Centimetres Inches
Double quad 1016 x 1524 mm 101.6 x 152.4 cm 40 x 60 inches
Quad crown 762 x 1016 mm 76.2 x 101.6 cm 30 x 40 inches
Double royal 635 x 1016 mm 63.5 x 101.6 cm 25 x 40 inches
Double crown 508 x 762 mm 50.8 x 76.2 cm 20 x 30 inches
Imperial paper sizes UK comparison chart

Our poster frame sizes are referred to by the size of their paper insert - for example, an A3 frame. In some cases, the size of the frame itself will be larger than the print.

Frames tend to overlap your poster slightly, so be careful to avoid placing anything important in this area. This is why in many of our products we refer to the "visual area".

Standard uses for all the different paper sizes

Standard uses for smallest paper sizes

A10, A9, A8, A7 and A6 are the smallest paper sizes. They're typically used to display product and pricing information, such as on product labels or food display tickets.

Standard uses for A6, A5 and A4 poster sizes

The small paper sizes, including A6, 1/3 A4, A5 and A4, are really versatile and suits many uses. They're often used for leaflet displays and countertop signs.

Standard A4 and A3 posters

A2, A3 and A4 are the most popular sizes for snap frames. They tend to be used for information posters such as fire safety, cleaning rotas, and certifications.

Largest paper sizes

The largest poster sizes include 40" x 60", A0 and A1. They're popular for pavement signs and large-scale advertising posters such as movie posters.

Do you need bespoke sign printing? Check out our printed and branded products page to see all the items we can add your designs to. Or explore our full product range to see all kinds of poster and leaflet holders, in the paper sizes that you need.

Kira Swales

Kira Swales

Kira Swales is a copywriter for UK POS. Kira has nine years' experience in e-commerce and copywriting, with a background in retail. She enjoys researching topics in depth in order to provide readers with the latest information on point of sale merchandising. Read more of her comprehensive guides in our Knowledge Hub.