Business Envelopes – #9 and #10, Regular and Window Options

Our #9 and #10 business envelopes are essential for everyday mailing needs—offering a professional and polished way to send invoices, letters, statements, and other business correspondence. Available in both regular and window styles, these envelopes are designed to match your workflow, whether you’re hand-inserting documents or using automated systems.

Professional Mailing Made Simple

The #10 envelope (4.125″ x 9.5″) is the most common business envelope size—ideal for standard 8.5″ x 11″ documents folded into thirds. The #9 envelope (3.875″ x 8.875″) is often used as a return envelope or for smaller enclosures.

Choose the sealing style that suits your process—gum seal for traditional moisture-activated sealing or simple seal (self-seal) for a faster, mess-free option. Window envelopes help streamline your operations by displaying pre-printed addresses, saving time, and ensuring a clean, professional appearance.

Product Features

• Available in #9 and #10 sizes

• Regular and window face options

• Choose from gum seal or simple seal closures

• White wove paper with smooth finish

• Perfect for invoices, letters, statements, and more

• Optional custom printing for logos and branding

Our business envelopes combine quality, security, and efficiency—an essential tool for any professional mailing operation.