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A3 Posters Size

Everything about
A3 Posters

What is the A3 size for posters?

A3 posters are cost-efficient outdoor promotional materials as their small size makes it easy to reproduce them, letting you save more money on production. Furthermore, while their surface space is limited, it still lets you incorporate simple yet eye-catching designs coupled with short but relevant information.

A3 Poster dimensions in Millimetres, Centimetres and Inches

Paper format: A3 Poster
Dimensions in Millimeters: 297 x 420 mm
Dimensions in Centimeters: 29.7 x 42 cm
Dimensions in Inches: 11.69 x 16.54 in

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When should I use A3 Posters?

A3 posters are ideal if you are on a low budget but still want some visibilty; it is a great format for indoor advertising such as in hallways or corridors as it is nor too small, nor too big. In fact, you can even potentially distribute them for added brand exposure. They are also small enough for your prospects to keep in their bags without much trouble. This means it is very likely for those who took your posters to read them during their spare time. This can then potentially lead to some word-of-mouth from your recipients, telling other people about what your brand has to offer.

Aside from these features, there are different A3 size poster materials that will surely add value to them. For instance, there is the standard 135 gsm gloss MC which is perfect for indoors. There is also the 115 gsm Blueback colour blocking for billboards and poster walls. There is 170 gsm PVC, which is waterproof, making it a great option for outdoor promotions. Finally, our range also includes double-sided posters, neon posters, sticky posters, photo posters and others, all for you to choose.

If you are looking for a reliable outdoor promotional material that is easy to reproduce and distribute, then go for A3 posters. To learn more about the different poster formats, feel free to get in touch with us and we will be more than happy to help, or consult our poster offering directly.

Printing resolution for A3 Posters

The resolution needed to print A3 size images with the best quality is 297 x 420 mm at 300 ppi (pixels per inch). Please do note that you would still have to add a bleed of 3 mm on all sides of your design, to ensure you receive your printed products exactly as you expected. InDesign has a tool with which you can easily add bleed to your designs, but in Photoshop you will have to add bleed manually. Not sure if you added bleed the right way? Check our free templates on the product page of the product you’re ordering!
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What our customers say

Love this print company and definitley… Kris 5.08.2020

Love this print company and definitley think I will use this more often!

This company is absolutely amazing!!! Amy W 2.08.2020

This company is absolutely amazing!!! After dealing with all the UK printers as I am a graphic designer, HelloPrint impresses me again and again. Nothing is too much trouble, they really go above and beyond for all their customers from checking files, proofing and helping answer all my questions when needed. All my customers are super happy with their print. If I could give this company a 10/5 stars I sure would as they deserve it. Thanks to Ben & the team for being amazing as always.

Posters using Etsy downloads Miriam Baguley 1.08.2020

I ordered three custom sized posters for a birthday present using downloads from Etsy. They arrived promptly and are perfectly sized and of a very high quality (much better than I was expecting). They look amazing and I will use this service again and would highly recommend to others. Thanks!