Anatomy of an Envelope

A standard diagonal seam envelope is the most common style envelope in use today. Its parts are basically the same regardless of its size or name. The corners, flaps, shoulders, throat, seal and seams may vary slightly in size, curvature or shape in different makes and models.

To help you understand the terms used by envelope manufacturers, we have illustrated a basic diagonal seam envelope showing the most common terms applied to its parts. These terms are used regardless of its style - diagonal, side or center seam - open end or open side.

In the glossary you will find additional terms defined that will help you know envelopes better. We hope you will take a few minutes of your valuable time to read and become familiar with them.

Back view of standard commercial diagonal seam envelope.