Envelopes are essential household and office stationery items designed to enclose flat documents or cards, providing protection and privacy while transmitting them via mail or courier services. Typically made of paper or paperboard, envelopes come in various sizes and styles such as letter, invitation, or business envelopes tailored to accommodate different mailing requirements.
In addition to mailing personal letters, home cooks, and consumers utilize envelopes for various purposes such as organizing recipe cards, sending out RSVPs for events, and sharing samples of seeds or dried herbs. Envelopes with transparent windows provide a quick preview of the contents, while security envelopes with patterns ensure confidential information remains hidden from prying eyes.