Best Generic Envelopes in 2026

Large clasp envelopes are a staple in any office. Whether you need to mail a large document or just keep the pages of your annual report together in your desk, these Office Depot manila clasp envelopes can help.

Reinforced metal clasp closure helps secure your documents inside the brown envelopes.

Box of 100 envelopes.

Simply lift and press! Lift & Press closure provides a permanent seal immediately upon contact, so you can be sure that your documents will safely arrive at their destination. Plus, you can easily see addresses with these double-window envelopes.

Tamper-evident seal provides added protection.

With Office Depot double-window recycled envelopes, there's no need to write out labels. Windows display the return and mailing address.

Excellent for home and office use, these #10 Office Depot envelopes are perfect for all your mailings. Security-window envelopes help save you time and keep sensitive information private.

Made of crisp, 24-lb white wove for a substantial feel.

Security envelopes are tinted inside for privacy and confidentiality.

Ideal for direct mail, annual reports, catalogs and brochures.

Opens along the long side for faster, easier insertion of contents.

Made of bright, 24-lb white wove paper.

When changing weather conditions might mean smudging hand-written addresses, have peace of mind knowing that the address window of these #10 security envelopes will get your important documents to their destination.

Security window envelopes feature addresses that appear through the left window - no need to hand-address.

#10 white envelopes are made from crisp 24-lb white wove for a substantial feel.

Simply peel off the release strip and press! With Office Depot clean seal envelopes, you will get your mailing tasks done quickly and easily.

Office Depot Clean Seal envelopes form a secure seal quickly, with no moisture required.

Open-end design allows quick and easy filling.