These #10 security self-seal envelopes are designed for efficient and confidential correspondence. Each envelope measures 4-1/8 by 9-1/2 inches, the standard No.10 size suitable for business letters, invoices, and statements.

Made from sturdy 24-pound white paper, they offer a professional appearance while maintaining durability during handling and mailing. The self-seal closure eliminates the need for licking or moistening—simply peel the protective strip and press to create a secure seal. This feature speeds up mailing preparation, making it ideal for high-volume office tasks. The windowless design ensures complete privacy, as no portion of the contents is exposed. A subtle security tint is integrated into the paper, making it difficult to read the enclosed document through the envelope. This adds an extra layer of protection for sensitive material such as financial records or legal papers. The interior of the envelope is also subtly patterned to further obscure any view, providing peace of mind for both personal and business use. The opaque construction helps keep the contents confidential from the moment of insertion. Printing is straightforward with these envelopes. The exterior accepts both inkjet and laser printer inks without smudging, thanks to the smooth finish. Address blocks and return logos come out crisp and clear, ensuring a polished look for professional correspondence. The paper weight of 24 pounds strikes a balance between flexibility and rigidity, allowing the envelope to hold its shape in printers and mail sorting equipment. They are compatible with most office printers and copiers, as well as with manual addressing. This bulk pack contains 1000 envelopes, offering substantial savings per unit compared to smaller quantities. The economical pricing makes it a practical choice for businesses, home offices, or organizations that process significant amounts of mail regularly. Storage is easy due to the compact box design, and each envelope is stacked neatly for quick access. The self-seal adhesive maintains its tackiness over time, so envelopes purchased in bulk remain functional even after extended storage.

These envelopes combine convenience, security, and affordability. The no-window style and security tint protect contents, while the self-seal closure speeds up workflow. The 24-pound paper and printer-friendly surface ensure professional results with minimal preparation. For anyone needing a reliable supply of No.10 security envelopes at a competitive price, this 1000-pack provides an excellent solution for everyday mailing needs.