A Guide to Standard Envelope Sizes for Direct Mail
A direct mail campaign is only effective if the recipient actually opens the envelope. The physical size and shape of the envelope immediately communicate what is inside. Whether you are sending a corporate invoice or a luxury gala invitation, choosing the right standard envelope size is the critical first step.
Business vs Invitation Formats
Envelopes are categorized by a numbering system that can be quite confusing at first glance.
- The Corporate Standard: The #10 envelope is the standard business size, measuring exactly 4.125 by 9.5 inches. This is perfectly designed to hold a standard sheet of paper folded in thirds.
- The Premium Mailer: The A6 and A7 sizes are widely used for invitations and greeting cards. Their wider, rectangular shape signals to the recipient that the contents are personal or exclusive.
The Raven32 Recommendation
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