10 Best A4 Peel And Seal Envelopes in The UK

Last updated on 12/08/2025

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9.8

Exceptional

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Blake

Blake Purely Everyday C4 324 x 229 mm 90gsm Self Seal Pocket Envelopes (FL2891) White - Pack of 250

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Why We Love It

Premium quality white envelopes.
Convenient self-seal feature.
Perfect for professional printing.

Main Highlights

Quality 100gsm White Envelopes
Easy to use Self Seal
Suitable for printing

TRIPLE PRIO A4 C4 White Peel and Seal Pocket Envelopes 229 x 324 mm - Secure Self Seal No Window Design - Pack of (50)

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Why We Love It

Protects sensitive data inside.
Ultra strong self-seal adhesive.
Ideal for large mailings.

Main Highlights

SECURITY TINTED - Our premium business envelopes are designed with a security tint pattern to protect sensitive data inside the documents.
QUICK PEEL AND SEAL CLOSURE - Each envelope has an ultra strong self-seal adhesive strip that requires no moisture.
NO WINDOW DESIGN - Manufactured with a windowless front panel for easy printing, labeling, stamps or hand-addressing, perfect for quick, mass, home and business mailings.
LONG LASTING SUPPLY - Packs of 25, 50 and 100 envelopes are available for a long lasting supply. Ideal for everyday home, school, office and business correspondence for large mailing tasks. This simply makes it a perfect stationary set.
PRINTER FRIENDLY - Printer friendly with smooth thick paper saves you time and frustration while printing without having to worry about jamming.

Blake Purely Everyday C4 324 x 229 mm 100 gsm Pocket Peel and Seal Plain Envelopes (23891) White - Pack of 250

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Why We Love It

Secure and user-friendly closure.
High quality, durable paper.
Perfect for business use.

Main Highlights

Secure Peel and Seal Closure for ease of use, added security and extra shelf life
High quality 100 gsm paper
Ideal for business correspondance, letters, brochures and more
Paper finish: uncoated

Postmaster A4 C4 Envelopes 229 x 324 mm 100 GSM Self Seal White 100 Pack

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Why We Love It

Keeps your documents private.
Eco-friendly and sustainable.
Self-seal for easy closure.

Main Highlights

C4 ENVELOPE - Designed to take sheets of A4 Paper unfolded. Designed to be sent using a single Large Letter 1st Class or 2nd Class Stamp (max 100g)
KEEPS YOUR DOCUMENTS PRIVATE - our envelopes are printed on the inside with an opaque blue pattern that makes it difficult to see what is inside the envelope
PEFC-CERTIFIED FOR SUSTAINABILITY - PEFC is a European based Forest certification system, that allows small- and family forest owners to demonstrate their excellence in sustainable forest management
HYGIENIC & FAST - this envelope features Self Seal closing, which means no licking or peeling. Simply press the flap down for a secure, hassle free close
MADE IN THE UK - we manufacture millions of Envelopes for some of Britain's biggest Organisations as well as for thousands of small, home based businesses using quality, bright white 100GSM paper. The Paper can be written on, labelled or can be used with most household & office printers

25 Packs A4 / C4 Self Seal Pocket Envelopes, Kraft Peel and Seal Envelopes, No Window Design, Letter Envelopes for Office, Home, School (Size: 324 x 229 mm)

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Why We Love It

Convenient self-sealing design.
High-quality, durable construction.
Versatile for various uses.

Main Highlights

25 PACKS LETTER ENVELOPES: This package include 25 kraft envelopes(Size: 324 x 229 mm), perfect for storing files, documents, magazines and reports.
SELF-SEALING DESIGN: The A4 / C4 envelopes are designed with a self-adhesive strip, just peel and seal. No glue and glue sticks required, no need to lick the envelopes to seal. The strip is highly adhesive and keeps internal documents secure.
HIGH QUALITY: These envelopes are made of high quality paper material that is thick and sturdy, ensuring that the contents of the envelope remain private.
VERSATILE USE: Our envelopes are suitable for a variety of occasions such as office, school, business, home and so on. Great for mailing or storing documents, business letters, invitation cards, photos, magazines and more.
Printable: Our blank envelopes are compatible with most laser or inkjet printers, allowing you to print addresses, shipping labels, graphics and more!

Manilla Brown C4 Gusset Envelopes to Fit A4 Paper/Card Strong 26mm Expanding Archive Width Peel & Seal Envelopes, Paper Mailing Bags Pack of 10 (A4 + (324x229x26mm))

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Why We Love It

Durable and reliable material.
Expanding sides for convenience.
Quick and secure sealing.

Main Highlights

ENVELOPES : Heavy duty 120gsm material for excellent strength are strong, durable and reliable envelope.
MAILING ENVELOPES : These paper gusset envelopes are the ideal solution if you are looking to post more bulky items or documents , can be used as mailing bags to post many items whether being paper , clothes, tapes, and any unbreakable item.
EXPANDING SIDES: The expanding sides are ideal for holding more than the conventional envelope. Gusseted seam construction for generous depth. Stocked in a range of sizes with expanding sides.
QUICK, EASY & SECURE: Peel & Seal strip reduces packing time & cost by providing a strong & hassle-free seal while also offering extended shelf-life over self seal envelopes - just remove the strip & press the flap down to seal!
PACKING & POSTAGE: A more cost-effective & waste-free alternative to plastic bags, these light yet sturdy paper envelopes / bags are also cheaper to post to cardboard boxes. You may write on them directly to eliminate the need for extra address labels.
Many more colours and sizes available

Evour A4/C4 Self Seal White Pocket Envelopes – 229x324mm, 100 GSM, No Window – for Home, Office, and Business Mailing Pack of 25

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Why We Love It

Requires no extra materials.
Quick, secure self-seal closure.
Compatible with various printers.

Main Highlights

SELF-SEAL ENVELOPES- Each envelope has an ultra-strong self-seal adhesive strip that requires no moisture, A Quick Self Seal Closure.
NO WINDOW DESIGN - Manufactured with a windowless front panel for easy printing, labeling, stamps, or hand-addressing, perfect for quick, mass, home, and business mailings. Office Supply envelopes
HASSLE-FREE & PRACTICAL: The self-seal adhesive eliminates the need for any tape, glue, or licking to seal these envelopes - just fold & press the top flap to secure them shut! These envelopes are also compatible with most inkjet and laser printers.
A4 C4 Size: 324mm x 229mm White 100 GMs
MULTIPURPOSE: These envelopes are ideal for mailing & organizing invoices, letters, statements, catalogs, periodicals, brochures, etc. They are a cost-effective option for everyday home, office & commercial use!

Blake Business C4 324 x 229 mm 120 gsm Peel & Seal Pocket Envelopes (31653) Ice White Wove - Pack of 20

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Why We Love It

Luxurious design enhances mail impact.
Secure closure ensures peace of mind.
Versatile for all printing methods.

Main Highlights

Make a difference to your mail with these luxurious Premium Business envelopes by Blake
Secure Peel & Seal closure for added security and ease of sealing
Suitable for Digital, Inkjet and Laser printing
Quality 120 gsm FSC Certified Paper
Available in 10 different shades

15 A4 C4 Brown Manila Envelopes - Peel and Seal - A4 Unfolded - 80gsm - Royal Mail Large Letter

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Why We Love It

High-quality manila envelopes included.
Fits A4 documents unfolded perfectly.
Secure peel and seal closure.

Main Highlights

✅ 15x BROWN MANILA ENVELOPES – A4 C4 SIZE Includes 15 high-quality brown manila envelopes (C4), perfectly sized for sending unfolded A4 documents.
📏 FITS A4 UNFOLDED – 324 x 229mm C4 dimensions allow you to send documents flat – no folding needed, ideal for professional use.
🔒 PEEL & SEAL STRIP – NO MESS Secure self-adhesive seal for quick, easy, and tamper-evident closure. No glue or licking required.
💼 STRONG 80GSM PAPER Made from durable 80gsm brown manila for everyday reliability – perfect for home, school or office.
📮 ROYAL MAIL LARGE LETTER COMPATIBLE Sized to qualify for Royal Mail’s Large Letter category – helps save on postage for bulk mailings.
🧾 VERSATILE USES Ideal for sending invoices, CVs, contracts, certificates, and important paperwork securely.

GP Globe Packaging 50 x C4 A4 White Plain Self Seal Paper Envelopes (Size: 324x229mm) - Printer Safe & Fully Opaque Security Envelopes - Business Mailing Envelopes for Office & Home Use

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Why We Love It

Perfect fit for A4 documents.
High-quality 90gsm construction.
Secure self-sealing design.

Main Highlights

INCLUDED IN THIS PACK: A pack of 50 white paper envelopes | SIZE: C4 (fits A4 paper sheets) | ENVELOPE DIMENSIONS: 324mm x 229mm | THICKNESS: 90gsm | MADE in the UK
ENHANCED SECURITY: Our white mailing envelopes feature an interior blue security tint to obscure text, ensuring confidential documents stay private. Send with confidence and protect sensitive information effortlessly!
EASY-TO-USE: The self-seal adhesive ensures tamper-proof closure without the need for tape, glue, or licking - simply fold and press the flap shut! These plain envelopes are also compatible with most inkjet and laser printers.
AN EVERYDAY ESSENTIAL: These self-seal envelopes are perfect for organising & posting letters, invoices, brochures, legal documents, payslips, statements, etc - a budget-friendly mailing solution for any home or office!
AN ECO-CONSCIOUS CHOICE: Our white envelopes are made from paper sourced from sustainably managed forests (PEFC Certified) and are 100% recyclable. These postal envelopes are kind to your wallet, and also the planet!

8.9

Excellent

We scanned 1885 products

We reviewed these offers relevant to the A4 Peel And Seal Envelopes within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Blake, TRIPLE PRIO, Postmaster, amassan, Craft21 Limited, evour, YLAB, Globe Packaging, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best A4 Peel And Seal Envelopes in the market, we considered we took a deep dive into 9426 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Blake Purely Everyday C4 324 x 229 mm 90gsm Self Seal Pocket Envelopes (FL2891) White - Pack of 250. We love many things about this product by Blake. What sets it apart from the competition is Premium quality white envelopes. , Convenient self-seal feature. , Perfect for professional printing.
The best value product for most shoppers and where user satisfaction is continuously the highest is TRIPLE PRIO A4 C4 White Peel and Seal Pocket Envelopes 229 x 324 mm - Secure Self Seal No Window Design - Pack of (50) by TRIPLE PRIO based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for A4 Peel And Seal Envelopes and the best cost-to-value ratio is Blake Purely Everyday C4 324 x 229 mm 90gsm Self Seal Pocket Envelopes (FL2891) White - Pack of 250at Blake with a 20% discount.
Our list of the best A4 Peel And Seal Envelopes is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best A4 Peel And Seal Envelopes in The UK

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We scanned 1885 products

We concluded that: