A3 Printing

Whether you’re using it for your business or for personal use at home, A3 is a popular printing size that offers plenty of space to write or design everything you need. Perfect for posters, printed artwork, signage and so much more, the A3 paper size is a great way to get your business messaging out there. But before you start creating your artwork, do you know what the A3 dimensions in pixels are? And what resolution you need to be setting your blank canvas up in? We’ve detailed down all the information you need to know about the A3 size here.

A3 Printing
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A3 Poster

A3 Posters

  • Pick from classic Silk or Waterproof stocks
  • Choose your lamination type
A3 Flyers

A3 Flyers

  • Pick from 4 stocks
  • Thin to thick paper available
A3 Correx Sign

A3 Correx Signs

  • 100% recyclable white fluted Correx® by Corplex
  • Our most affordable custom signage
A3 Foam Sign

A3 Foam Signs

  • Durable yet lightweight PVC foam
  • Easy to stick to any surface
A3 Aluminium Sign

A3 Aluminium Signs

  • Aluminium sheet sign printing
  • Weather and corrosion resistant
A3 Cardboard Sign

A3 Cardboard Signs

  • 2000mic cardboard advertising signs
  • Thick, 100% recyclable cardboard
A3 Magnetic Sign

A3 Magnetic Signs

  • Perfect for large metal surfaces
  • Delivered within two working days
A3 Whiteboards

A3 Whiteboards

  • Printed on durable 400mic Staufen
  • Easy write-on, wipe-off gloss finish
A3 Wall Calendars

A3 Wall Calendars

  • Two sizes and stocks to choose from
  • Monthly calendar printing for organisation

Quality Print,

Sustainably Sourced

Promote your business sustainably with our print options! Whatever impact you would like to make, we’ve got an option for every occasion and every business. We have the perfect size and paper stock to suit every occasion - no matter the budget you’re working with, so you’re sure to find what you’re looking for.

We only use paper stocks from FSC® certified suppliers
The FSC (Forest Stewardship Council®) are an international organisation dedicated to improving responsible management of the world's forests. Look out for our FSC Certified products.
We use the greenest paper options available
We use FSC Mix and FSC Recycled for all of our prints, which are the most sustainable options.
We're Carbon Neutral
We earned our Carbon Neutral certificate in 2021, meaning we reduced our carbon emission as much as possible, then invested in offsets to balance out any leftover emissions.

We're ISO 14001:2015 Certified

We work towards a set of environmental management standards where an external auditor measures our impact on the environment. We then create a plan of action on how to keep reducing the impact every year!

War on Waste Campaign

Our internal War on Waste campaign has been running since 2018, and has seen us change processes to reduce our waste output. We eliminated 100% of waste in our Inkjet stream and are working every day to go further!

Recyclable Packaging
Responsible Waste Management
Plastic Reduction Strategy
10 Point Artwork Check
Carbon Neutral Manufacturing

Meet Okay Doodle

"We are currently loving the foiled business cards, they look absolutely stunning and definitely up our game when it comes to offering something unique."

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Customer Reviews for A3 Print

Design Like a Pro with instantprint

Unleash Your Creativity with our New Design Tool!

At instantprint, we want to make printing simple and easy so business owners can make the designs they have in their head a reality. In this video, we'll introduce you to instantprint's new design online tool, packed with thousands of templates for business cards, flyers, banners, and more. Whether you're a gardener, makeup artist, florist, cafe owner, or restaurateur, this tool has something for you. With its user-friendly interface, you can quickly create stunning designs that represent your brand in just a few clicks. No need to hire a professional designer or spend hours figuring out complicated design software.

Need extra help? Read our handy guide on how to get started.

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Creating a solid brand means ensuring every aspect of your business is cohesive – including your business signs. Whether you’re newly established or wanting to freshen up your old branding, here’s why it’s important and how to get it right.
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How to Make a Poster for Print

Our step-by-step guide shows you exactly how to set up your poster artwork for print using a range of popular design programs, including Word and Photoshop. Follow our quick guide for a perfect poster print job every time.
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How to Design a Business Sign

Business signs are so important. Think about it: if a business didn’t have a sign above the door, you’d probably not even notice it exists. That’s why it’s so important to get the design right. Here’s how!
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Frequently Asked Questions

What are the A3 dimensions?

The A3 paper size measures at 420 mm x 297mm and is the ideal poster size that’s not too big, but not too small! Bigger isn’t always better when it comes to advertising, and if you’re looking for something a little more modest for your shop front or to let people know about your office charity bake sale, the A3 paper size is perfect. If you’re designing your new marketing collateral in inches, cm or pixels, don’t worry, here is the sizing for you:

A3 size in cm: 29.7 x 42

A3 size in inches: 11.7 x 16.5

A3 size in pixels: 4961 x 3508

Despite its smaller size, if you have limited window or wall space, the A3 paper dimensions are great as the size still offers plenty of space for your artwork or information.

What resolution do I need for the A3 size?

Having the right resolution set up when you start designing any artwork is incredibly important for print. Even though the A3 size is smaller than its A1 and A2 siblings, you don’t want the quality to be poor when your final masterpiece is printed and delivered.

Creating your design using a resolution of 420mm x 297mm at 300dpi (dots per inch), will make sure the end A3 printing quality is the best it can be. Don’t forget, you’ll also need to add your 3mm bleed onto the above dimensions, this will ensure there’s no white border around your finished product.

If you’ve got an experienced inhouse design team to create your artwork then great! They should know how to set up the dpi and add the bleed onto your blank canvas in the likes of Photoshop and InDesign. But, if you’re designing your A3 size posters or signs yourself, don’t worry! We’ve got a couple of in templates to get you going:

How to set up your A3 size in Photoshop

How to set up your A3 size in InDesign

What can I design at an A3 paper size?

Big enough to hold your design but small enough to fit into any awkward spaces you may have in your business; A3 posters, flyers and signs are ideal for advertising a range of things. Slightly larger than a standard A4 flyer, your A3 posters can still be handed out to people to spread the word about any upcoming event nights at your local bar or restaurant.

The A3 paper size also makes it ideal for popping onto notice boards and up in the office kitchen, if you need to make any announcements to your employees.

Did you know our posters printed in the A3 dimensions can also be created either single or double sided? Pop them in your store window and show one message facing out to attract customers in, and something else on the shop facing side – maybe further price reductions for your seasonal sales.

No matter your poster, flyer and marketing collateral needs, we’ve got you covered with our A3 printing services.