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Collection: Large Letter Size Envelopes

The envelope format that unlocks large letter postage rates. Large letter size envelopes are sized to fit within Royal Mail's large letter specification (up to 353 x 250mm, max 25mm depth) - allowing you to send thicker documents, multiple sheets and small flat items at the large letter rate rather than the higher small parcel rate.

Browse related: Large Letter Postal Boxes | Standard Letter Size | Letterbox Friendly Envelopes

177 products

Bronze Pearlescent Envelopes - Peel and Seal DL - 110 x 220mm
Eco Product

Bronze Pearlescent Envelopes

Regular price From £0.11
Sale price Regular price
Burgundy Coloured Peel and Seal Envelopes - C4 - 324 x 229mm
Eco Product

Burgundy Coloured Peel and Seal Envelopes

Regular price £0.68
Sale price Regular price
Burgundy Matt Finish Bubble Bag Mailers - C5+ - 250 x 180mm

Burgundy Matt Finish Bubble Bag Mailers

Regular price From £0.64
Sale price Regular price
Burgundy Matt Finish Foil Envelopes - C6 - 114 x 162mm

Burgundy Matt Finish Foil Envelopes

Regular price From £0.21
Sale price Regular price
Burgundy Organza Bag - 300 x 200mm

Burgundy Organza Bag

Regular price
Sale price From £0.14 Regular price £0.16
C5+ Nylon Mesh Zipper Pouch (235 x 180 mm) - Blue
New

C5+ Nylon Mesh Zipper Pouch (235 x 180 mm)

Regular price £2.43
Sale price Regular price £0.00
Cardinal Red Pearlescent Envelopes - Peel and Seal DL - 110 x 220mm
Eco Product

Cardinal Red Pearlescent Envelopes

Regular price From £0.11
Sale price Regular price
Cello Peel and Seal Bags - Header 170 x 125mm
Eco Product

Cello Peel and Seal Bags

Regular price From £0.07
Sale price Regular price
Champagne Pearlescent Envelopes - Peel and Seal DL - 110 x 220mm
Eco Product

Champagne Pearlescent Envelopes

Regular price From £0.11
Sale price Regular price
Champagne Tuck Flap Pearlescent Envelopes - 140 x 200mm

Champagne Tuck Flap Pearlescent Envelopes

Regular price From £0.66
Sale price Regular price
Clear Translucent Envelopes - Square - 160 x 160mm

Clear Translucent Envelopes

Regular price
Sale price From £0.39 Regular price £1.34
Copper Pearlescent Envelopes - Peel and Seal DL - 110 x 220mm
Eco Product

Copper Pearlescent Envelopes

Regular price From £0.16
Sale price Regular price
Dark Blue Coloured Peel and Seal Envelopes - C4 - 324 x 229mm

Dark Blue Coloured Peel and Seal Envelopes

Regular price From £0.25
Sale price Regular price
Dark Blue Matt Finish Bubble Bag Mailers - C5+ - 250 x 180mm

Dark Blue Matt Finish Bubble Bag Mailers

Regular price From £0.85
Sale price Regular price
Dark Blue Matt Finish Foil Envelopes - C6 - 114 x 162mm

Dark Blue Matt Finish Foil Envelopes

Regular price From £0.21
Sale price Regular price
Dark Green Coloured Peel and Seal Envelopes - C4 - 324 x 229mm

Dark Green Coloured Peel and Seal Envelopes

Regular price From £0.31
Sale price Regular price
Dark Green Eco Friendly Bubble Bag Mailers - 165 x 100mm
Eco Product

Dark Green Eco Friendly Bubble Bag Mailers

Regular price
Sale price From £0.17 Regular price £0.25
Dark Red Coloured Peel and Seal Envelopes - Without Window C4 - 324 x 229mm

Dark Red Coloured Peel and Seal Envelopes

Regular price From £0.16
Sale price Regular price
Load video: Post Marque Gusset 160gsm Peel & Seal Envelopes
Eco Product

Dark Red Premium Peel and Seal 160gsm Envelopes

Regular price From £0.52
Sale price Regular price
Dark Yellow Board Back Envelopes - C4 - 324 x 229mm

Dark Yellow Board Back Envelopes

Regular price £0.66
Sale price Regular price
Dark Yellow Coloured Peel and Seal Envelopes - Without Window C4 - 324 x 229mm

Dark Yellow Coloured Peel and Seal Envelopes

Regular price
Sale price From £0.07 Regular price £0.31
Deep Green Coloured Peel and Seal Envelopes - Square - 220 x 220mm

Deep Green Coloured Peel and Seal Envelopes

Regular price £0.35
Sale price Regular price
Document Enclosed Holder - No 235 x 315mm

Document Enclosed Holder

Regular price From £0.07
Sale price Regular price
Glassine Biodegradable Envelopes - Square - 40 x 40mm
Eco Product

Glassine Biodegradable Envelopes

Regular price From £0.11
Sale price Regular price
Gloss Metallic Bubble Bags -

Gloss Metallic Bubble Bags

Regular price From £0.05
Sale price Regular price £0.00
Gold Board Envelopes - 235 x 162mm
Eco Product

Gold Board Envelopes

Regular price From £0.82
Sale price Regular price
Gold Coloured Peel and Seal Envelopes - C4 - 324 x 229mm

Gold Coloured Peel and Seal Envelopes

Regular price From £0.24
Sale price Regular price
Gold Matt Finish Bubble Bag Mailers - C5+ - 250 x 180mm

Gold Matt Finish Bubble Bag Mailers

Regular price £0.85
Sale price Regular price
Gold Metallic Finish Bubble Bag Mailers - 165 x 140mm

Gold Metallic Finish Bubble Bag Mailers

Regular price From £0.52
Sale price Regular price

More About "Large Letter Size Envelopes"

This collection covers over 175 products suited to a wide range of mailing and packaging applications. The range spans over 305 size options, a range of colour options, paper weights from 20–350gsm, gummed (lick-and-seal) and peel & seal closures.

Product types include: Amazon FBA, Anti Static Bags, Bag, Biodegradable Bags, Board Back Envelopes, Book Wrap Mailers.

Benefits

  • Size variety — over 305 size options across the range.
  • Colour options — a range of colour options available.
  • Closure choice — gummed (lick-and-seal) and peel & seal to suit different workflows.
  • Royal Mail compatible — qualifies as large letter or letter or small parcel within standard weight limits.

Frequently Asked Questions

What types of products are in this collection?
This collection contains over 175 products covering Amazon FBA, Anti Static Bags, Bag, Biodegradable Bags, Board Back Envelopes, Book Wrap Mailers. Use the sort and filter options to find the right product for your specific size, format and quantity requirements.

Are these products Royal Mail compatible?
Yes — products in this collection use standard UK postal formats compatible with Royal Mail's size and weight categories. Always check packed weight before assigning a postage rate.

Trustpilot Verified

What Our Customers Say

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

Read more reviews at Trustpilot

Black and white photo of a person with long hair against a plain background

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!

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

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.

Man in a suit with a blurred green outdoor background

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!

Woman wearing a yellow sweater with a plain background

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!

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

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!

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

Bernie Webber

Great Company To Buy From

Great company to buy from. Very helpful and communicative.


Man wearing a dark suit with a red tie against a plain background

Paul Craig

Prompt and Efficient Service

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

Man in a suit smiling outdoors with a blurred background

Richard

Fantastic Customer Service

Fantastic Customer Service

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