Custom postcards sitting on table ready to ship to client

Standard Postcard Sizes & How to Choose the Right One in Canada

Brian Kroeker

January 24, 2025

Summary:

  • Postcards are a great marketing tool that you can hand out or mail to your customers and clients. You can choose a standard size, oversized or custom size postcard.
  • Canada Post requires the width of a postcard to be between 5.6” to 9.6” and the height between 3.6” and 6.1”. It also needs to weigh under 1.7 oz and not be thicker than 0.16”.
  • Determine the amount of images and text you’re using and your target audience to influence your postcard size choice. Consider your budget as well—smaller postcards typically cost less.
  • If you’re unsure which postcard size and design is best, try A/B testing or using a hybrid campaign to see which one your clients and customers respond to better.
  • When you’re ready to print your postcards, choose Little Rock for customized options like 6 paper types and more. Order a free paper sample kit to get an idea of which paper type works best for your business.

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Postcards are a versatile and cost-effective medium for personal and business communication, widely used for marketing, invitations and holiday greetings. They’re typically sent to clients or customers via mail or handed out if too large to mail. In Canada, postcard sizes are regulated by Canada Post, which establishes specific dimensions and mailing requirements to ensure compatibility with their postal systems.

Choosing the right postcard size is crucial not only for optimizing mailing costs but also for effectively conveying your message. Our experts at Little Rock Printing put together a guide to help you decide which postcard size is right for your business needs, along with design and cost considerations.

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Bold colourful postcards being printed at Little Rock Printing

Common Postcard Dimensions

Before we dive into the various postcard dimension options, it’s good to know Canada’s post requirements. If you’re mailing a postcard through Canada Post, they must fall within these specifications:

Width: 5.6” to 9.6”

Height: 3.6” to 6.1”

Thickness: at least .009” and no more than .016”

Aspect Ratio: 1:3:1 to 2:6:1

Weight: under 1.7 oz

Now that you know the post requirements, here are some of the most common dimensions used for postcards.

Standard Postcards

  • Dimensions: Minimum 5.5” x 3.5” to maximum 6” x 4.25”.
  • Postage Cost: Lower postage rates, typically categorized under the “Lettermail” service.
  • Usage: Great for minimalist designs for a direct mail marketing campaign, plus it’s affordable and lightweight.

Oversized Postcards

  • Dimensions: Larger than 6” x 4.25” and up to 12” x 6”.
  • Postage Cost: Higher postage rates, categorized under “Oversized Lettermail” or “Parcel.”
  • Usage: Useful for making a bold visual impact or including more detailed content like varied colours and intricate linework.

Custom Sizes

  • Dimensions: Any non-standard size outside the above ranges. At Little Rock, we offer custom sizes up to 18” x 12”.
  • Postage Cost: May require special handling or parcel rates.
  • Usage: Unique designs for niche campaigns or special occasions.

Design & Cost Considerations for Different Sizes

When designing your postcard, you should consider how much information to include on them. This will help determine which size postcard you’ll need to order. The more graphics and information you include the larger your postcard will need to be. Here are some factors to consider when designing your postcard.

Images

High-impact imagery benefits from larger sizes to allow for better detail and visibility. Smaller sizes work best for simple visuals or minimalistic designs.

Text

If detailed information or multiple calls-to-action are necessary, larger sizes are better suited. For concise messages or teaser campaigns, standard sizes are more cost-effective and visually focused.

Target Audience

Larger postcards will grab the attention of your clients and customers and are more effective for audiences that respond to bold visuals. Smaller postcards appeal to audiences that prefer concise, to-the-point messaging.

Mailing Cost Implications

As mentioned above, there are postage costs to consider when choosing your postcard size. Standard size postcards will have a lower postage cost, making them ideal for large-scale campaigns on a budget or if you’re mailing postcards at a high frequency. 

Larger sizes will have a higher postage cost or will have to be handed out to your intended audiences; however, you have greater design flexibility and impact. These may be worth the extra cost for a premium campaign or if you’re targeting high-value clients and customers.

Postcards for Scrooser North America

Testing Different Formats in Your Marketing Campaigns

If you’re unsure which postcard size is right for your campaign, you could test different sizes and designs to see what your clients and customers respond to better. Here are some different things you can try for the test.

A/B Testing: Test different sizes with the same message to evaluate response rates. Compare standard vs oversized or custom size postcards to identify cost effectiveness.

Analyze Metrics: Use QR codes, custom URLs or trackable phone numbers to measure the success of each format.

Consider Hybrid Campaigns: Start with a large postcard to grab your customer or client’s attention and then follow up with a smaller postcard as a reminder about your campaign or offer.

Print Samples: Test different print designs to ensure the visual elements align with the chosen size and maintain readability.

Enter Your Email to Get a Free Sample Paper Kit

And also get 15% off your first order!

Get Started

Print Your Postcards With Little Rock

By aligning postcard size with design priorities and budget considerations, you can optimize your campaign for maximum impact while managing costs effectively. To customize your postcard even more, choose from a variety of paper types.

At Little Rock, we offer 6 paper types varying in thickness and coating so you can choose something totally unique for your campaign. You can even order a free sample paper kit to see which paper type is best for your project. For more details on your postcard order or any other print products we offer, contact the Little Rock Printing experts.

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