Envelope Sizes and Inserts
One of the very first steps when planning a mailing campaign involves carefully selecting the appropriate envelope sizes and inserts. Since every mailing serves a different purpose, you must consider various factors—such as mailing type, intended audience, and desired outcome. Fortunately, we offer a wide range of envelope printing services and provide all necessary insert materials, including brochures, letters, and response cards. This selection ensures that your mailing stands out while maintaining both functionality and professionalism.
Contrary to popular belief, envelopes do not need to remain plain, black-and-white, or limited to a simple stamp. Instead, you can take advantage of ample design freedom to create eye-catching envelopes that not only attract attention but also leave a lasting impression. By incorporating bold colors, logos, or other visual elements, you can effectively increase engagement while reinforcing brand identity.
For further inspiration, explore our portfolio page, where you will find various envelope design examples.
USPS® Notice 123 – Effective since January 21, 2018
When it comes to widely used mailing materials, the #10 Regular Mailing Envelope and the #9 Reply Envelope remain among the most popular choices. Together, they create an effective mailing system, most commonly used for appeal mailings.
How It Works:
- First and foremost, the sender addresses the #10 Regular Mailing Envelope directly to the recipient.
- Inside, the sender includes the #9 Reply Envelope, allowing recipients to respond more easily.
Moreover, this setup enables recipients to fill out required information or enclose a check before placing it inside the #9 Reply Envelope. By offering a seamless way to return materials, this approach significantly increases the chances of receiving a response.
Announcement Envelope Sizes
In addition to business-sized envelopes, many individuals and businesses frequently use Announcement envelope sizes (shown below). These envelopes work particularly well for holding postcard-sized materials, making them an excellent choice for wedding invitations, event announcements, and special occasion mailings.
A frequently used and highly effective combination often includes an A7 Envelope paired with an A6 Response Envelope. Typically, the sender places a postcard or invitation along with the A6 Response Envelope inside the outer A7 Envelope, which already features the recipient’s address for added convenience. As a result, recipients can effortlessly RSVP to the event without any complications. By implementing a well-structured mailing setup, you can substantially improve the likelihood of receiving a timely response.
Announcement Envelope Sizes (“A” Sizes)
| Envelope Name | Envelope Size | Enclosure Size |
|---|---|---|
| A1 | 3 5/8 x 5 1/8 | 3 3/8 x 4 7/8 |
| A2 | 4 3/8 x 5 3/4 | 4 1/4 x 5 1/2 |
| A6 | 4 3/4 x 6 1/2 | 4 5/8 x 6 1/4 |
| A7 | 5 1/4 x 7 1/4 | 5 1/8 x 7 |
| A8 | 5 1/2 x 8 1/8 | 5 3/8 x 7 7/8 |
| A9 | 5 3/4 x 8 11/32 | 5 5/8 x 8 5/8 |
| A10 | 6 x 9 1/2 | 5 7/8 x 9 1/4 |
Business & Correspondence Envelope Sizes
| Envelope Name | Envelope Size | Enclosure Size |
|---|---|---|
| # 6 1/4 | 3 1/2 x 6 | 3 1/4 x 5 3/4 |
| # 6 3/4 | 3 5/8 x 6 1/2 | 3 1/2 x 6 1/4 |
| # 6 5/8 | 3 5/8 x 8 5/8 | 3 1/2 x 8 6/16 |
| # 7 | 3 3/4 x 6 3/4 | 3 1/2 x 6 1/2 |
| Monarch (7 3/4) | 3 7/8 x 7 1/2 | 3 3/4 x 7 1/4 |
| # 9 | 3 7/8 x 8 7/8 | 3 3/4 x 8 11/16 |
| # 9 (Policy) | 4 x 9 | 3 3/4 x 8 1/2 |
| #10 | 4 1/8 x 9 1/2 | 4 x 9 1/2 |
| DL | 4 5/16 x 8 5/8 | 4 1/8 x 8 3/8 |
| #11 | 4 1/2 x 10 3/8 | 4 1/4 x 10 1/8 |
| #12 | 4 3/4 x 11 | 4 1/2 x 10 3/4 |
| #14 | 5 x 11 1/2 | 4 3/4 x 11 1/4 |
| #16 | 6 x 12 | 5 3/4 x 11 3/4 |
Catalog Envelope Sizes
| Envelope Name | Envelope Size | Enclosure Size |
|---|---|---|
| # 1 | 6 x 9 | 5 3/4 x 8 3/4 |
| # 1 3/4 | 6 1/2 x 9 1/2 | 6 1/4 x 9 1/4 |
| # 3 | 7 x 10 | 6 3/4 x 9 1/2 |
| # 6 | 7 1/2 x 10 1/2 | 7 1/4 x 10 |
| # 8 | 8 1/4 x 11 1/4 | 8 x 10 3/4 |
| # 9 3/4 | 8 3/4 x 11 1/4 | 8 1/2 x 10 3/4 |
| #10 1/2 | 9 x 12 | 8 3/4 x 11 1/2 |
| #12 1/2 | 9 1/2 x 12 1/2 | 9 1/4 x 12 |
| #13 1/2 | 10 x 13 | 9 3/4 x 12 1/2 |
| #14 1/2 | 11 1/2 x 14 1/2 | 11 1/4 x 14 |
| #15 | 10 x 15 | 9 3/4 x 14 1/2 |
| #15 1/2 | 12 x 15 1/2 | 11 3/4 x 15 |
Booklet Envelope Sizes
| Envelope Name | Envelope Size | Enclosure Size |
|---|---|---|
| # 3 | 4 3/4 x 6 1/2 | 4 1/2 x 6 |
| # 4 1/2 | 5 1/2 x 7 1/2 | 5 1/4 x 7 |
| # 5 | 5 1/2 x 8 1/8 | 5 1/4 x 7 5/8 |
| # 6 | 5 3/4 x 8 7/8 | 5 1/2 x 8 3/8 |
| # 6 1/2 | 6 x 9 | 5 3/4 x 8 1/4 |
| # 6 5/8 | 6 x 9 1/2 | 5 3/4 x 9 |
| # 6 3/4 | 6 1/2 x 9 1/2 | 6 1/4 x 9 |
| # 7 1/4 | 7 x 10 | 6 3/4 x 9 1/2 |
| # 7 1/2 | 7 1/2 x 10 1/2 | 7 1/4 x 10 |
| #9 | 8 3/4 x 11 1/2 | 8 1/2 x 11 |
| #9 1/2 | 9 x 12 | 8 3/4 x 11 1/2 |
| #10 | 9 1/2 x 12 6/8 | 9 1/4 x 12 1/8 |
| #13 | 10 x 13 | 9 3/4 x 12 1/2 |
