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Window Envelopes
The format that eliminates address labels entirely. Window envelopes show the recipient's address through a transparent panel printed directly on the letter inside, making them the standard for invoices, statements, payslips, and any high-volume mailing where consistency and speed matter. Available across sizes in left, right, and centre window positions.
Browse related: Window Business Envelopes | DL Envelopes | Business Envelopes | Peel and Seal Business Envelopes
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More About "Window Envelopes"
Window Envelopes are defined by a clear window panel showing the address through the envelope. With 2 products in the range, they are used for business mailings, invoices, statements where standard envelopes or packaging would not deliver the same level of presentation or function.
Available in 4 sizes including C5 - 229 x 162mm, Square - 220 x 220mm, C4 - 324 x 229mm, 248 x 330mm, at 180gsm paper weight. Closure: peel & seal self-adhesive.
Benefits of Window Envelopes
- Distinctive construction — a clear window panel showing the address through the envelope that differentiates from standard formats.
- Size range — 4 sizes to match your specific application.
- Quality stock — 180gsm for a premium result.
- Royal Mail compatible — qualifies as large letter or letter within standard weight limits.
Frequently Asked Questions
What are window envelopes best used for?
Window Envelopes are the preferred choice for business mailings, invoices, statements. The a clear window panel showing the address through the envelope gives them a distinctive appearance or function that standard envelopes cannot replicate.
What sizes are available?
Window Envelopes are available in 4 sizes: C5 - 229 x 162mm, Square - 220 x 220mm, C4 - 324 x 229mm, 248 x 330mm. 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 within Royal Mail's size and weight limits. Always confirm weight and thickness with each specific size before committing to a postage format.
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!
Charlotte Goodman-Brooks
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.
SR
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!
Grace
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!
Rebecca R
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!
Bernie Webber
Great company to buy from. Very helpful and communicative.
Paul Craig
Very helpful staff directing me to exactly the right item needed.
Richard
Fantastic Customer Service

