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Collection: Window Business Envelopes

The standard for professional business correspondence. Window business envelopes feature a clear film window that displays the printed address through the envelope - eliminating the need to address each envelope separately, reducing labour costs and the risk of address mismatches in high-volume mailings.

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

5 products

White Premium Business Envelopes - Without Window N A C4 - 324 x 229mm

White Premium Business Envelopes

Regular price
Sale price From £0.10 Regular price £0.12
White Blue Opaque Gummed Business Envelopes - 100gsm With Window DL - 110 x 220mm

White Blue Opaque Gummed Business Envelopes

Regular price
Sale price From £0.07 Regular price £0.12
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 Blue Opaque Peel and Seal Business Envelopes - No Without Window

White Blue Opaque Peel and Seal Business Envelopes

Regular price
Sale price From £0.08 Regular price £0.40
Postal Inspection Envelope - With Window 115 x 225mm
Eco Product

Postal Inspection Envelope

Regular price £0.09
Sale price Regular price

More About "Window Business Envelopes"

Window Business Envelopes are defined by a clear window panel for address-through mailing. With 5 products in the range, they are used for bulk business mail, invoices, payslips where standard envelopes or packaging would not deliver the same level of presentation or function.

Available in over 15 sizes including 102 x 216mm, 110 x 220mm, 114 x 162mm, 114 x 229mm, 114 x 235mm and more, at 75–140gsm paper weight. Closure: gummed (lick-and-seal) and peel & seal.

Benefits of Window Business Envelopes

  • Distinctive construction — a clear window panel for address-through mailing that differentiates from standard formats.
  • Size range — over 15 sizes to match your specific application.
  • Quality stock — 75–140gsm for a premium result.
  • Royal Mail compatible — qualifies as large letter or letter within standard weight limits.

Frequently Asked Questions

What are window business envelopes best used for?
Window Business Envelopes are the preferred choice for bulk business mail, invoices, payslips. The a clear window panel for address-through mailing gives them a distinctive appearance or function that standard envelopes cannot replicate.

What sizes are available?
Window Business Envelopes are available in over 15 sizes: 102 x 216mm, 110 x 220mm, 114 x 162mm, 114 x 229mm, 114 x 235mm, 115 x 225mm 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 within Royal Mail's size and weight limits. Always confirm weight and thickness with each specific size before committing to a postage format.

Customer Feedback

What Our Customers Say

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

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Envelope Printing Customer

Branded envelopes that felt event-ready

We needed branded envelopes for a client event and they looked exactly right. The team were helpful from start to finish and made sure everything moved quickly so we could meet our deadline. A really smooth experience for printed envelopes.

Woman with long brown hair wearing a beige top against a plain background

Envelope Customer

Quick fix after an order issue

My order arrived with a problem, but after I emailed the team I received a quick response and the issue was sorted straight away. It was handled professionally and made me feel confident about ordering again.

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First Time Customer

Fast support when delivery went wrong

There was an issue with the courier delivering to my address, but the team dealt with it quickly and kept things moving. A replacement was arranged and the previous order was refunded without any fuss. It gave me a good first impression and I would order again.

Woman wearing a yellow sweater with a plain background

Wholesale+ Member

Reliable support for regular orders

The courier caused a problem, but Jess and Kelly were quick to help and did everything they could to sort it. They also looked at the products I order regularly and helped make future orders easier. Good value, good quality and service that feels genuinely useful.

Woman with gray hair wearing a blue top against a light gray background

Envelope Printing Customer

Easy custom printed envelope order

Ordering custom printed envelopes was straightforward from the start. James answered my questions clearly, the order arrived when expected and the finished envelopes were great quality. I would be happy to use the service again.

Man wearing a light gray sweater over a collared shirt on a plain background

Wholesale+ Member

Helpful and easy to deal with

A very straightforward company to buy from. The team were helpful, clear with communication and easy to deal with, which makes a big difference when ordering packaging regularly.

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Sample Customer

Helpful advice before ordering

The team helped point me towards the right product before I placed my order. It made the decision much easier and gave me confidence that I was choosing the right packaging for what I needed.

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Packaging Customer

Useful support for flat pack cartons

Useful support for flat pack cartons