Envelope Styles and Sizes

The humble envelope, an often overlooked but important piece of folded paper that acts as the main vessel for our mail. It enwraps so many letters and leaflets every year but what of its kind is truly known and appreciated. This lovely conveyer of parcels not only provides information as to where it needs to be delivered but serves as the first impression for the materials found within. A beautifully crafted envelope can heighten the already fantastic design of your printed material.

Below is a quick synopsis of envelopes along with their various sizes and templates to help you design the best envelope for your needs. If you need any help or have any question we are always here, just call 602-437-9700 or come by and visit us. Also be sure to check out our envelope design tips here to help get your creative sparks flowing.


The classic envelope style with its iconically triangular flap, the Pointed Flap is typically used for items striving to denote regality and a personable aura such as high society invites and greeting cards.



4 Baronial

3 58 × 5 18

5 Baronial

4 18 × 5 58


5 14 × 7 14


This modern envelope style, the Square Flap, features a big, bold square flap that can act as a beautiful canvas for a myriad of stunning designs.




4 38 × 5 34


4 34 × 6 12


5 14 × 7 14


5 12 × 8 18


6 × 9 12


Much like its square colleague, the Wallet Flap proudly wears a big flap but distinguished its flap with handy rounded corners. This helps it keep all its content securely inside even with bulkier items.



6 12

6 × 9

6 34

6 12 × 9 12

7 12

7 12 × 10 12

9 12

9 × 12


9 12 × 12 58


10 × 13


The Commercial Flap is all about business. The shorter flap with the rounded corners makes for shorter production work in preparing the envelope while maintaining its seal with larger printed materials.



6 14

3 12 × 6

6 34

3 58 × 6 12

7 34

3 78 × 7 12

8 58

3 58 × 8 58


3 78 × 8 78


4 18 × 9 12


4 12 × 10 38


An old veteran of the post box, the Mailpoint Flap, was made to house big stuff like catalogs or thick stacks of paper. However, Mailpoint’s time in the sun is setting as the Wallet Flap seeks to replace it.




6 × 9

1 34

6 12 × 9 12

9 34

8 34 × 11 14

10 12

9 × 12

12 12

9 12 × 12 12

13 12

10 × 13

14 12

11 12 × 14 12


Catalog Envelope

Booklet Envelope

The difference between catalog envelopes and booklet envelopes is that catalog envelopes open on the short side, while booklet envelopes open on the long side.

Envelope Design Tips

Never Underestimate the Power of Great Envelope Design! For many designers, envelope design can feel limited with little opportunity to exercise creativity. We’re here to dispel that myth and show you stunning envelope examples while also providing you with tips on design and production of your envelopes.

1. Address the Address Area

The USPS has recommended placement standards for the address, return address, and postage indicia on all envelope sizes. In addition, they have ink coverage requirements that recommend no more than 7% ink coverage in the Optical Character Reader (OCR) read area to allow the address to be read by machine. Not following these suggested guidelines may result in your mail piece being nonmachinable and incurring extra postage fees. You can find these USPS standards for all envelope sizes on the USPS website.

Pro Tips for designing a standard #10 envelope:

  • For a standard #10 envelope, the return address should be ¼” from the top and left side of the envelope.
  • Leave a 1” x 1” space in the upper right-hand corner of the front side design for the postage or indicia.
  • The top of the mailing address cannot be placed higher than 2 ¾” from the bottom of the envelope.
  • There should be no more than 7% ink coverage in the addressing and barcode areas.
  • The Intelligent Mail Barcode (IBM) is approximately 3”x 5/8” and can be included in the address block \ if there is at least 3 ½” of horizontal space available. (Ask your Courier Graphics rep for more information this.
  • If the barcode is not included in the address block, it will be placed by the USPS across the bottom of the envelope, toward the lower right corner, utilizing a space approximately ¾” x 4 7/8”. Keep important design elements outside of this space as it may be covered by the barcode.

2. To Add Bleeds or Not to Add Bleeds

Don’t make the assumption that when you are designing an envelope that you cannot have any bleeds. You can! But you need to follow a few best practices for your design to accommodate the die-cutting and converting of the envelope

Pro Tip: Work with an approved template for your envelope and build a ¼” bleed into your design wherever your envelope will have print or ink coverage up to the very edge when finished and converted.

3. Addressing vs Labeling? It Can be a Complete Knockout!

You absolutely must know how the envelope will be labeled for mailing. Will the address be printed directly onto the envelope each time? Will you affix an address label? As you create the design, you will either (A) create a safe address area that follows USPS placement guidelines for addressing directly onto the envelope (knocked out or screened back from the design) or (B) design around the possibility of a label being affixed. Unless discussed in advance, you’ll want to be sure that the recommended address area will readable by the automated machines when going through USPS system.

4. Coordinate with the Content

As we all know, an envelope is never a standalone piece. And a typical collateral package has three styles or sizes of envelopes. Most common are a #10, a catalog or booklet envelope, and an envelope for a note or thank you card. The thought of designing those might make some designers yawn, but we challenge you to put your creative superpowers to work and design something exciting and beautiful that will make your brand, your sales collateral, or your direct mail really stand out.

Need inspiration? Check out Pinterest or Instagram or other gallery sites. Then come to Courier Graphics for templates, dielines, and expertise. As a team, we’ll make sure your design and our production score a “10” on the WOW-meter!