Why Postcard Size Matters: Choosing Between a 4″ x 6″ and 5″ x 7″ cards

Recently updated on October 17th, 2025 at 06:29 pm

Postcards come in a variety of sizes, each suited for different marketing or personal projects. Bigger postcards that grab attention are often used in Every Door Direct Mail (EDDM) campaigns. However, the classic 4″ x 6″ postcard still has plenty of charm, especially if you’re keeping costs in check. So, when should you go small and when should you size up to a 5″ x 7″ postcard? In this article, we’ll break down the advantages of both size options and share when to use them, so you can pick the postcard size that delivers the best results for your goals.

Comparing 4″ x 6″ vs. 5″ x 7″ Postcard Sizes!

4″ x 6″ Postcards

The 4″ x 6″ postcard is a budget-friendly option that’s easy to print and mail. Its compact size makes it perfect for quick, impactful texts and straightforward visuals. The smaller size allows senders to personalize the postcard’s message for their specific audience; ideal for targeted promotions, event reminders, or even notes of gratitude. If you are a business owner running a sale or just sending a personal greeting, this postcard is the perfect choice.

5″ x 7″ Postcards

The 5″ x 7″ postcard is still smaller than the standard EDDM postcards, but it gives you a bit more room to get creative while staying cost-effective. The extra space makes it easier to display larger, eye-catching images or help expand your promotional messages to a broader customer base. It’s also a viable Business Mail Entry Unit (BMEU) option, providing businesses with an entry point to send and kickstart more EDDM postcard marketing to a specific area.

	4″ x 6″ Postcards	5″x 7″ Postcards
Visual Impact	This postcard keeps most designs simple for quick promotions. Messages are straight to the point or personalized for a specific recipient.	The slightly larger size format balances text and images to grab attention. Promotions are also straight to the point, with images highlighting the sale or event.
Design Space	With limited space for text and graphics, this postcard size works best when you want to share concise, personal messaging.	This postcard size allows for bolder and more eye-catching designs. It also offers room for other important details, without looking cluttered.
Best Use	This size is ideal for short-term promotions and special offers where simplicity is key. 4″ x 6″ postcards are also good as marketing reminders and thank you notes for target audiences.	This size works best for the first BMEU postcards sent during a long-term EDDM campaign. They are also great as promotional reminders for a wider customer base.
Target Audience	A cost-friendly choice for sending direct mail to long-term clients, personal greetings, or everyday business promotions.	The 5” x 7” format appeals to a wider audience, conveying a more professional feel and making strong first impressions.
Mailing Strategy	The 4″ x 6″ postcard works well for direct mail to your long-term customers. These postcards can also be distributed at trade shows.	The 5″ x 7″ postcard is ideal as part of Every Door Direct Mail (EDDM) campaign. Postcards are also great for events and used as promotional handouts.

Factors to Consider When Choosing Your Postcard Size

Aside from their perks and uses, there are also key factors like budget, marketing goals, design needs, and audience preferences when deciding between 4” x 6” and 5” x 7” postcards. It helps to weigh in these elements before finalizing your choice and moving forward for the design.

1. Budget: How does cost affect the choice between the two sizes?

• While both postcard sizes are generally affordable, the 4″ x 6″ option is the most budget-friendly and easier to print for bulk orders.
• The 5″ x 7″ postcard remains cost-effective and is a smart option if you plan a long-term campaign.

2. Marketing Goals: Do I go for quick promotions or detailed storytelling?

• You can choose the 4″ x 6″ size when you need to print simple postcards that act as reminders or discount coupons for your trusted clients.
• The 5″ x 7″ size is better suited for campaigns that require concise storytelling for a brand or product promotion.

3. Design Needs: What’s the best use of text, images, and overall layout?

• No matter the size, ensure your text, images, and overall layout stay visually consistent and draw attention.
• Always balance images with text to avoid a cluttered, overwhelming design.

4. Audience Preferences: What resonates best with your recipients?

• Some recipients prefer smaller postcards they can easily keep or collect, while others appreciate the larger, more striking format.
• Consider whether you’re targeting a small group with personalized direct mail or reaching a broader audience.

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Choosing the right postcard size is about understanding how you want your message to be showcased. Think about the promotion you’re going for and how your design will catch someone’s eye. Whether you want something that feels personal and friendly, or something that creates a strong impression with attention-grabbing details, the key is making sure the look and feel reflect your brand’s personality. Let NextDayFlyers help you print and mail your promotional postcards, ensuring speed and quality, regardless of the size you choose.

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