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Collection: Self Seal Business Envelopes

Fast, clean, and reliable for high-volume office use. Self-seal business envelopes close with a pressure-activated adhesive that requires no moisture, making them a practical choice for busy mail rooms and offices that need to seal envelopes at speed. Available across standard sizes and paper weights.

Browse related: Business Envelopes | DL Envelopes | Peel and Seal Business Envelopes | Gummed Business Envelopes

4 products

White Blue Opaque Self Seal Business Envelopes - Without Window Wallet C5 - 162 x 229mm

White Blue Opaque Self Seal Business Envelopes

Regular price
Sale price From £0.07 Regular price £0.08
White 90gsm Self Seal Business Envelopes - C5 - 162 x 229mm

White 90gsm Self Seal Business Envelopes

Regular price
Sale price From £0.10 Regular price £0.11
Manila Self Seal Business Envelopes - Wallet DL - 220 x 110mm

Manila Self Seal Business Envelopes

Regular price
Sale price From £0.07 Regular price £0.11
Premium Self-Seal Ecommerce Postal Box - 350 x 215 x 130mm

Premium Self-Seal Ecommerce Postal Box

Regular price £4.44
Sale price Regular price

More About "Self Seal Business Envelopes"

Self Seal Business Envelopes are defined by self-seal closure in standard business formats. With 4 products in the range, they are used for fast business dispatch, office use where standard envelopes or packaging would not deliver the same level of presentation or function.

Available in over 5 sizes including 110 x 220mm, 114 x 162mm, C5 - 162 x 229mm, 178 x 254mm, 350 x 215 x 130mm and more, at 80–130gsm paper weight. Closure: peel & seal self-adhesive.

Benefits of Self Seal Business Envelopes

  • Distinctive construction — self-seal closure in standard business formats that differentiates from standard formats.
  • Size range — over 5 sizes to match your specific application.
  • Quality stock — 80–130gsm for a premium result.
  • Royal Mail compatible — qualifies as large letter or letter or small parcel within standard weight limits.

Frequently Asked Questions

What are self seal business envelopes best used for?
Self Seal Business Envelopes are the preferred choice for fast business dispatch, office use. The self-seal closure in standard business formats gives them a distinctive appearance or function that standard envelopes cannot replicate.

What sizes are available?
Self Seal Business Envelopes are available in over 5 sizes: 110 x 220mm, 114 x 162mm, C5 - 162 x 229mm, 178 x 254mm, 350 x 215 x 130mm, 216 x 270mm and more. Check individual product pages for full dimensions and capacity guidance.

Are they compatible with Royal Mail?
Yes — standard sizes qualify as large letter or letter or small parcel within Royal Mail's size and weight limits. Always confirm weight and thickness with each specific size before committing to a postage format.

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What Our Customers Say

See why we’re trusted as by thousands of UK businesses for packaging and envelopes through verified customer reviews.

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Aimée Thompson

We ordered some branded envelopes for a client event and they were a perfect addition. Jess and the team were extremely accommodating and attentive throughout the ordering process, pushing our order through to meet the tight deadline. I really recommend this company for branded materials. Thank you team!

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Charlotte Goodman-Brooks

Great Customer Service

Unfortunately my order arrived damaged but after emailing the issue over to the company I received a quick response from Jess who was able to fix the problem in minutes, thanks so much jess, fantastic customer service, will definitely be ordering from this company again.

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SR

Great Products, Quick Delivery

DPD were having issues delivering to my address and things were getting frustrating, but the company really stepped up. They sorted the problems with DPD quickly, the replacement arrived super fast, and they refunded my previous order without any hassle. Overall, I’m really impressed – amazing customer service, and I’ll definitely be ordering again!

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Grace

Proactive and Helpful

The courier let us down, but Jess and Kelly were hugely helpful and did everything they could to resolve it. They even arranged to specially stock products I order regularly to make future orders smoother. Great quality, good value and excellent customer service, with the phone answered on the first ring!

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Rebecca R

Really Easy Process

Really easy process to order some custom printed envelopes, James was so helpful and answered all my questions. The envelopes arrived on time and are really great quality, wouldn't hesitate to use this company again!

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Bernie Webber

Great Company To Buy From

Great company to buy from. Very helpful and communicative.


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Paul Craig

Prompt and Efficient Service

Very helpful staff directing me to exactly the right item needed.

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Richard

Fantastic Customer Service

Fantastic Customer Service