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Envelope Size Chart Quick Guide

Envelope Size Chart Quick Guide Cheat Sheet

A Handy Guide to Envelope Sizes: Unraveling the Mystery

Picture this: you’re planning a spectacular event, and the invitations are almost ready to be sent. All that’s left is finding the perfect envelope to encase your beautifully designed cards. But who knew there were so many envelope sizes to choose from? Fear not, intrepid planner! We’ve got your back with our foolproof Envelope Size Chart, designed to uncomplicate the convoluted world of envelopes. So let’s dive right in!

The A-Series: Aces of the Envelope World

There’s no need to be flabbergasted by the A-Series envelopes. They’re a versatile bunch, perfect for all occasions. Let’s break them down, shall we?

  • A2 Envelope (4.375″ x 5.75″): The A2 is the quintessential thank-you card, RSVP, and informal note envelope. It’s also great for enclosing photographs or recipe cards.
  • A4 Envelope (4.25″ x 6.25″): This compact envelope is often used for Announcements and Invitations, but don’t be afraid to get creative with it. A4s are an ace up your sleeve!
  • A7 Envelope (5.25″ x 7.25″): The A7 is the belle of the ball! It’s ideal for formal invitations, greeting cards, and even some brochures. It’s like a little black dress – always a classic choice.

The # Series: Business in the Front

The # Series envelopes mean business. They’re perfect for professionals and clock-punchers alike.

  • #9 Envelope (3.88″ x 8.88″): The #9 is the industrious little sibling of the #10. It fits perfectly inside its big sister, making it perfect for reply envelopes or business-related mailings.
  • #10 Envelope (4.13″ x 9.5″): The #10 is the go-to envelope for businesses. Slides effortlessly into mailboxes and can house invoices, contracts, and everything in between.
  • #10 Window Envelope (4.13″ x 9.5″): A slight twist on the #10, this envelope features a window that showcases the recipient’s address. It’s a nifty time-saver for bulk mailings, and let’s be honest, who doesn’t love a good window?

Beyond the Basics: Specialty Envelopes

While the A-Series and # Series envelopes are the bread and butter of the envelope world, there are plenty of other less-common envelopes that may be just the ticket for your unique needs.

  • Square Envelopes: As the name suggests, these envelopes are equal in length and width, creating a chic, modern look. Use them for invitations, promotional items, or when you’re feeling a little extra.
  • Catalog and Booklet Envelopes: These envelopes are designed for bulkier items, such as catalogs, magazines, and large brochures. They come in a variety of sizes and usually open on the short side of the envelope.
  • Baronial Envelopes: Perfect for elegant events, baronial envelopes have a pointed flap and are often made from high-quality paper. They can be used for wedding invitations, graduation announcements, and other formal affairs.

So there you have it – our comprehensive guide to envelope sizes! We hope this cheat-sheet will help you navigate the winding roads of the envelope universe and find the perfect size for all your mailing needs. If you still have questions,

If you find it useful or know someone who could use it, please share it!

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You can also download a High Resolution Print Ready Version of the Envelope Size Chart Quick Guide [PDF].

or view the large version on your browser [JPG]


Envelope Size Chart Quick Guide Cheat Sheet


This envelope size chart is provided as a quick reference when selecting the proper envelope size for your projects. If you have questions or are in need of an envelope size not listed in the envelope size chart, please feel free to leave a comment below or contact us right away!




Print and Design Expert


  • Nan
    March 5, 2016

    Trying to print A9 envelopes and can’t
    find a setting or get my printer to set to size! Help!!!!

    • Dan
      March 8, 2016

      Hi Nan, we can print A9 envelopes, please contact us through if you need a quote!

  • jaxaustin
    February 20, 2016

    Thanks to share such a great and useful information A4 envelopes. Really it is very nice and useful blog for all readers.

  • envelopesprinting
    December 16, 2015

    Pretty cool read! Beautifully described about envelopes sizes. The A4 envelopes size boasts the following dimensions: 324 x 229 mm. You may also find these written as ‘C4 envelopes’ on some sites. A4 is ideal for social/invitational purposes.

  • Kerrie
    April 23, 2012

    Thanks for showing this great info.. Helpful for me to know about size..

    • Giovanni
      April 23, 2012

      Kerrie, thanks for your comment! Glad you found the envelope size guide useful. Please bookmark it and share it with anyone you think may find it useful!


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