What Size Is a Greeting Card?

Greeting cards come in standard sizes like A7, A6, Square, and Slimline. Each format suits different occasions—weddings, thank-you notes, or business needs. Choosing the right size improves design flow, mailing efficiency, and user experience.

Picking the wrong size can lead to mismatched envelopes, higher postage, or production issues.

Why Does Greeting Card Size Matter?

Selecting the correct card size¹ is more than just a design choice—it affects your entire card workflow from aesthetics to logistics.

Greeting card size directly impacts envelope pairing, visual balance, and mailing cost. Oversized or irregular sizes may not qualify for standard postage, causing delays or extra fees.

The size also determines how much space you have for visuals, text, and personalization. If you're creating tarjetas de felicitación personalizadas, the right dimensions allow for creative layouts without compromising print quality or mailability.

How Size Impacts Design and Readability

Smaller cards feel more personal but have limited space. Larger ones provide room for detailed designs and heartfelt messages. The size must complement the message you want to convey².

What Are the Standard Greeting Card Sizes?

The most commonly used greeting card sizes include A7 (5” x 7”), A6 (4.5” x 6.25”), Square (5” x 5”), and Slimline (3.875” x 8.875”). These sizes align with standard envelopes and postal rules, reducing production and mailing headaches.

Choosing the right size³ is essential not just for printing, but also for selecting the correct envelope for greeting cards—a mismatch can cause crumpling or even result in the mail being returned.

Card Size Comparison Table

Card Type	Size (inches)	Size (cm)	Matching Envelope	Best For
A7	5” x 7”	12.7 x 17.8	A7 Envelope	Birthdays, Weddings, Holidays
A6	4.5” x 6.25”	11.4 x 15.9	A6 Envelope	Thank-you notes, casual cards
Square	5” x 5”	12.7 x 12.7	Square Envelope	Artful, creative messages
Slimline	3.875” x 8.875”	9.8 x 22.5	Business Envelope	Elegant, minimal designs

[Download PDF Size Chart]

Should You Choose Folded or Flat Greeting Cards?

Both folded and flat cards have their place depending on content length and context.

Folded cards provide more writing space and a traditional feel—great for emotional or formal messages. Flat cards offer a sleek, modern look that suits mass mailings or short notes.

If you're designing tarjetas de felicitación personalizadas for special events like weddings or corporate thank-yous, folded styles offer more room for personalization. Flat cards, meanwhile, are efficient for promotional campaigns or holiday inserts.

Pros & Cons Table

Card Type	Pros	Cons
Folded	Spacious, high-end appearance	Higher cost, bulkier
Flat	Simple, easy to print or stack	Limited message space

How to Choose the Right Card Size for Your Needs?

A6 and A7 are ideal for everyday and DIY uses. Businesses prefer A7 for its polished appeal, while designers opt for Square or Slimline to add visual punch. Mailing rules should always influence your final decision.

When evaluating greeting card sizes, start by asking: Who is the recipient? What's the occasion? Do you want to make a visual impact or deliver a brief note?

Choose Based on Use Case

• DIY / Craft Projects:
  A6 or A7 for manageable printing and trimming.

• Business or Corporate Events:
  A7 paired with quality stock for brand credibility.

• Creative or Portfolio Use:
  Square or custom-sized cards to differentiate.

Mailing Considerations

Postal systems like USPS and Royal Mail charge surcharges for non-standard shapes. Stick with A7 or A6 for optimal postage efficiency.

Are Greeting Card Sizes Different in Other Countries?

Yes. While the U.S. favors A7, countries like the UK and Australia also popularize Square and A6 formats. If you're mailing or printing globally, understanding these norms avoids waste and delays.

For international orders, ensure that both the greeting card size and the envelope for greeting cards meet postal regulations in the destination country.

International Size Preferences

Country	Common Sizes	Notes
USA	5” x 7” (A7)	Standard with USPS
UK	5” x 7”, 6” x 6”	Square cards widely used
Australia	A6, A7	Follows UK/U.S. standards

How to Match Greeting Cards with the Right Envelopes?

Proper envelope pairing enhances presentation and protects your message during transit. Always choose envelopes that fit the card size with a slight tolerance (1/8").

An envelope for greeting cards isn’t just about protection—it also sets the tone for what’s inside. A high-quality envelope adds perceived value and builds anticipation.

Tips for Envelope Selection

• Dimension Match:
  A7 cards need A7 envelopes—don't improvise.

• Material & Style:
  Choose between kraft, linen, glossy finishes depending on your design aesthetic.

• Bulk Ordering Tips:
  Sourcing envelopes in bulk from reliable vendors (Amazon, Neenah, local stationery) ensures color consistency and stock availability.

What Are the Printing and Bleed Size Guidelines for Cards?

Designing for print means understanding technical specs.

For an A7 card, design at 5” x 7” but set your canvas to 5.25” x 7.25” to include bleed. Always use CMYK color mode and 300 DPI resolution to ensure sharp, print-ready results.

Whether you're producing a simple design or a set of tarjetas de felicitación personalizadas, these technical settings help you avoid blurry images or off-center trims.

Printing Checklist

Element	Recommendation
Bleed Area	Add 0.125” on all sides
File Format	PDF preferred, CMYK, 300 DPI
Paper Choices	Matte (classic), Glossy (vivid), Textured (premium)

Frequently Asked Questions About Greeting Card Sizes

Even experienced card makers encounter technical or creative challenges. Here are a few common answers:

Common FAQs

• Can I customize card sizes?
  Yes, but check postal and envelope availability.

• What size fits home printers?
  A6 or A7—both are compatible with most inkjet and laser models.

• Can I use regular paper?
  Yes for flat cards. Use heavier cardstock for folded options.

• How to reuse or save templates?
  Store designs in formats like .PSD, .AI, or Canva for future edits.

Conclusion

Choosing the right greeting card size ensures your project looks polished and mails successfully.

Whether you're creating custom greeting cards or printing in bulk for business, understanding card sizes and envelope pairings helps avoid costly mistakes and enhances impact.