A1 vs A2 vs A3 Poster Printing: Which Size Is Right for Your Event or Campaign?

Picking the wrong poster size is genuinely costly. Not just money-wise. Time, effort, the whole thing. Too small, and people walk past without a glance. Too big and it feels off, like wearing shoes three sizes up. Size is not a minor detail. It changes everything.

Here is a straight, no-nonsense guide to help you get it right.

Why Poster Size Actually Matters

A poster is your first impression. Full stop. Whether you are pushing an event, launching a product, or running a local campaign, the size you choose controls how well your message lands.

Before you order anything, ask yourself:

•    Where exactly will this poster go?
•    How close will people be when they read it?
•    How much content, text, images and logos are you fitting in?
•    What is the budget looking like?

These four questions will save you from a reprint.

A3 Poster Printing: Compact, Close-Range, and Underrated

A3 is 297mm x 420mm, smaller than most expect but not a bad thing. Our personalised A3 foam board printing is ideal for compact, rigid countertop and desk displays.

Works well for:

•    Notice boards, shop windows, and pinboards
•    Waiting rooms, cafes, clinics and small reception desks
•    Indoor events where wall space is tight
•    Campaigns where the cost needs to stay low

Why it still works: People reading an A3 poster are usually standing close, maybe an arm's length away. At that distance, a sharp, well-laid-out design hits just as hard as something much larger. Exact Print produces A3 prints with strong colour and clean resolution, and the turnaround is fast. Good for urgent jobs.

A2 Poster Printing: The One Most People Get Right

A2 is 420mm x 594mm and genuinely the most versatile option. Our personalised A2 foam board printing brings that same versatility in a rigid, premium display format.

Works well for:

•    Retail windows and in-store promotions
•    Community events, exhibitions and local campaigns
•    Outdoor noticeboards with some shelter
•    Anything that needs to be seen from a few metres away

Why it works: There is real design space here. Your headline, image, logo, and call-to-action all fit without feeling cramped. Exact Print offers A2 photo quality poster printing, A2 waterproof poster printing built for outdoor conditions, and A2 canvas printing for something that looks more premium on a wall.

Worth noting: If it is going outside, even partially, pick the waterproof A2 option. Rain ruins standard paper fast.

A1 Poster Printing: Big Space, Bigger Statement

A1 is 594mm x 841mm — the size you use when the space is large. Our personalised A1 foam board printing delivers that same visual power in a rigid, freestanding exhibition format.

Works well for:

•    Trade shows, conferences, and big exhibitions
•    High-footfall public areas
•    Street-level advertising boards
•    Campaigns where the audience is viewing from a distance

Why it works: Size is doing a lot of work here. A bold image, short headline, strong colours. That combination on an A1 poster genuinely grabs attention before someone consciously decides to look. Exact Print handles A1 photo poster printing with high resolution and accurate colour, so even at this scale, nothing looks stretched or washed out.

Quick Size Comparison

Two Questions That Will Decide It

Still unsure? Keep it simple.

1.    How far away will people be when they see it? A greater distance means you need a bigger size.

2.    Is it indoors or outdoors? Controlled indoor spaces suit A3 or A2. Open, busy, or public-facing areas need A1.

That is genuinely all it comes down to most of the time.

Your Campaign Deserves the Right Print

Choosing the right poster size is the first step. But print quality finishes the job. Exact Print produces all three sizes with sharp detail, premium paper choices, and same-day delivery across London. Small indoor display or large outdoor campaign, the quality stays consistent.

Start your next print order with Exact Print and get it right the first time.