What is a poster size?

Understanding Poster Sizes

Posters are a versatile and effective way to communicate messages, advertise events, or decorate spaces. Whether you’re creating a poster for a business, an event, or personal use, understanding the different sizes available and their applications is crucial to maximizing their impact. This article will explore common poster sizes, their uses, and considerations for choosing the right size for your needs.

Common Poster Sizes

  1. Small Posters (A3 or 11″x17″)
  • Dimensions: A3 size is 11.7″ x 16.5″ (297mm x 420mm), while 11″x17″ is slightly smaller.
  • Uses: Ideal for personal use, small advertisements, or event flyers. Suitable for indoor use and close-up viewing.
  • Considerations: Easy to print and distribute, cost-effective, but limited visibility from a distance.
  1. Medium Posters (A2 or 18″x24″)
  • Dimensions: A2 size is 16.5″ x 23.4″ (420mm x 594mm), and 18″x24″ is a common North American size.
  • Uses: Great for promotional posters, event announcements, and moderate-scale advertising. Suitable for both indoor and outdoor use.
  • Considerations: Provides a balance between visibility and portability. More noticeable than smaller posters, yet still relatively easy to handle.
  1. Large Posters (A1 or 24″x36″)
  • Dimensions: A1 size is 23.4″ x 33.1″ (594mm x 841mm), while 24″x36″ is a standard size in many countries.
  • Uses: Perfect for larger events, movie posters, promotional displays, and outdoor advertising. Highly visible from a distance.
  • Considerations: Requires more space for display and can be more challenging to transport and store. Higher printing costs compared to smaller sizes.
  1. Extra-Large Posters (A0 or 27″x40″)
  • Dimensions: A0 size is 33.1″ x 46.8″ (841mm x 1189mm), and 27″x40″ is a standard movie poster size.
  • Uses: Ideal for large-scale advertising, exhibitions, and high-impact promotional displays. Extremely eye-catching and suitable for significant events or messages.
  • Considerations: Requires significant space for display, challenging to transport, and higher printing costs. Offers maximum visibility and impact.

Choosing the Right Poster Size

When selecting the right poster size, consider the following factors:

  1. Purpose: Determine the primary goal of your poster. Is it for a small event, a large advertisement, or an exhibition? The purpose will guide the size choice.
  2. Audience: Consider where your audience will be viewing the poster. For close-up indoor settings, smaller sizes may suffice. For outdoor or large venue displays, larger sizes are more appropriate.
  3. Display Location: Assess the available space for displaying the poster. Ensure the chosen size fits well within the intended area without overwhelming or underwhelming the space.
  4. Budget: Larger posters typically cost more to print. Balance your desired impact with your budget constraints to find an optimal size.
  5. Design Elements: Complex designs with detailed information may require larger posters to ensure readability and visual appeal. Simpler designs can be effective even at smaller sizes.


Choosing the right poster size is crucial for effectively conveying your message and achieving your goals. By understanding the common sizes available and considering factors such as purpose, audience, display location, budget, and design elements, you can select the perfect poster size for your needs. Whether you’re promoting an event, advertising a product, or decorating a space, the right poster size can significantly enhance the visibility and impact of your message.