Best Envelopes of 2026

The Blake Self Seal Envelopes are perfect for your everyday office mailings. With their self-seal feature, you can save time and effort, ensuring your documents are securely enclosed without the need for additional adhesives. The security opaque design keeps your contents private, providing peace of mind when sending sensitive information. Additionally, these envelopes come in a convenient pack of 100, allowing you to handle large volumes of mail easily. Their versatile size of 110 x 220 mm makes them suitable for a variety of documents.

The Blake DL Envelopes are designed for your everyday mailing needs. With an easy-to-use self seal closure, you can securely send your letters and documents without fuss. Made from high-quality 80 gsm paper, these envelopes provide a professional feel for all your correspondence. Ideal for business letters, brochures, and more, this handy pack of 50 ensures you always have enough on hand. Plus, the DL size is perfect for A4 sheets folded into thirds, making it a convenient choice for various tasks.

The Tallon Peel & Seal Envelopes are designed for your convenience. With free delivery in the UK, you can easily have them delivered right to your door. These envelopes are perfect for sending letters, documents, and A4 sheets, ensuring that your important papers reach their destination securely. The security print feature prevents visibility through the envelope, offering you peace of mind that your contents remain private during transit. Choose these envelopes for a reliable and practical mailing solution.

The Postmaster Peel & Seal Envelopes offer a convenient solution for your mailing needs. With a peel and seal design, these envelopes provide a quick and hygienic way to seal your letters without losing stickiness. Made from 100 GSM paper, they ensure that your documents are well protected during transit. Being manufactured in the UK, they also contribute to a lower carbon footprint. Additionally, their PEFC certification guarantees that the paper comes from sustainably managed forests, allowing you to feel good about your purchase.

The Blake C5 Envelopes are designed for convenience and ease of use. Featuring a self-seal closure, you can securely seal your letters and documents without the need for additional glue or tape. Made from high-quality 90 gsm paper, these envelopes provide a professional appearance, ideal for business correspondence and brochures. The handy pack of 50 ensures you have plenty on hand for all your mailing needs. Additionally, the C5 size is perfect for A4 sheets folded in half, making it versatile for various uses.

The Blake Envelopes Pack offers a secure peel and seal closure, making it easy for you to seal your correspondence without any fuss. Crafted from high-quality 100 gsm paper, these envelopes are perfect for all your business needs, ensuring a professional appearance. You can also print directly onto them, which is ideal for custom branding or addressing. Additionally, the window size of 3.5 × 9 centimetres allows for clear visibility of your letters or brochures, enhancing your communication efforts.

The Uncle Paul Envelopes pack includes 45 white envelopes in various sizes, perfect for your mailing needs. With a self-seal adhesive strip, closing the envelopes is quick and convenient, ensuring that your contents are securely enclosed. The security tinted design protects sensitive information with a blue printed pattern inside. Each envelope is made from 100GSM paper, providing durability and a professional finish, making them ideal for both personal and commercial use.

The Blake Self Seal Envelopes are an excellent choice for anyone needing to send invoices, letters, or brochures securely. Their blue opaque printed interior ensures extra security and confidentiality, giving you peace of mind that your important documents remain private. The easy-to-use self-seal closure saves you time and effort, making the process more convenient. With a pack of 1000, you'll have plenty of envelopes on hand for all your mailing needs.

The Postmaster DL Envelopes are designed to securely hold A4 sheets folded into thirds, making them ideal for mailing documents. With their opaque blue interior, you can ensure your sensitive information remains private. The self-seal feature allows for quick and hygienic closure, eliminating the need for licking. Additionally, these envelopes are PEFC-certified, meaning they come from sustainably managed forests, providing peace of mind for environmentally conscious users.

The Blake Envelopes Pack offers a secure peel and seal closure, ensuring ease of use and added security for your important documents. Made from high-quality 100 gsm paper, these envelopes are perfect for business correspondence, letters, brochures, and more. You will appreciate their suitability for printing, allowing for custom designs and branding. With this pack of 500, you'll have plenty of envelopes ready for any occasion, enhancing your organisational efficiency.