Envelope Sizes

Envelope Sizes and Inserts

Choosing of an envelope size and confirming it will accommodate your insert(s), is the first step when deciding what type envelope, you need. Then the type of mailing you are going to send is usually the next consideration to have. Is this for general stationary or specific correspondence or accompanying insert materials such as brochures? Or are you sending seller direct or buyer letters?

The most commonly used envelopes are the business/commercial No. 10 regular mailing envelope and corresponding No. 9 Reply Envelope. These can be used together for appeal mailings, which will provide the recipient with the carrier No. 10 Regular Mailing Envelope addressed to them and a No. 9 Reply Envelope inside. Usually these help the recipient fill out information or a check and place it in the #9 Reply Envelope. Providing them with a means of returns significantly increases the chance of them sending something back.

Besides business sized envelopes, the next most popular are the Announcement envelope sizes – see below. These usually hold flat or folded note cards, postcard sized inserts, announcements or invitations for seminars or events. The most common combination would be the use of an A7 Envelope with an A6 Response envelope. You can place a card/invitation and A6 Reply Envelope into the outer A7 Envelope with addressing on it along with the card you are mailing, that way the recipient can easily RSVP for the event.