Collection:
Standard Letter Size Envelopes
The most cost-effective way to send flat correspondence. Standard letter size envelopes and packaging fit within Royal Mail's letter format (up to 240 x 165mm, max 5mm depth, 100g) - qualifying for the lowest postage rate for everyday correspondence, invoices, marketing inserts and single-sheet communications.
Browse related: Large Letter Size Envelopes | DL Envelopes | Business Envelopes
355 products
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C6 Summer Envelope Bundle (100 Pack)
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C5 Vibrant Envelope Bundle (100 Pack)
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C5 Classics Envelope Bundle (100 Pack)
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C5 Summer Envelope Bundle (100 Pack)
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Diamond White Conqueror Envelopes
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Rose Organza Bag
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Navy Organza Bag
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Black & Blue Fancy Paper Lined Envelopes
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Anti-Static Grip Seal ESD Bag
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Orange Board Back Envelopes
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Bronze Butterfly Envelopes
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Gold Butterfly Envelopes
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Light Brown Coloured Peel and Seal Envelopes
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Mid Brown Coloured Peel and Seal Envelopes
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White Premium Window Peel and Seal 180gsm Envelopes
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Deep Green Coloured Gummed V Flap Envelopes
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Mid Blue Coloured Gummed V Flap Envelopes
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Robin Egg Blue Coloured Gummed V Flap Envelopes
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Burgundy Matt Finish Bubble Bag Mailers
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Hot Pink Metallic Finish Bubble Bag Mailers
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Silver Holographic Metallic Finish Bubble Bag Mailers
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Lilac Lustre Coloured Gummed Greeting Card V Flap Envelopes
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Pale Blue Coloured Gummed Greeting Card V Flap Envelopes
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Spearmint Green Coloured Gummed Greeting Card V Flap Envelopes
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Ice Blue Matt Finish Foil Envelopes
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Black & Green Fancy Paper Lined Envelopes
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Silver Grey Pochette Envelopes
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Platina Pochette Envelopes
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Mid Grey Pochette Envelopes
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More About "Standard Letter Size Envelopes"
This collection covers over 355 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, Business Envelopes.
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 355 products covering Amazon FBA, Anti Static Bags, Bag, Biodegradable Bags, Board Back Envelopes, Business Envelopes. 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.
What Our Customers Say
See why we’re trusted as by thousands of UK businesses for packaging and envelopes through our customer reviews.
Envelope Printing Customer
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.
Envelope Customer
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.
First Time Customer
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.
Wholesale+ Member
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.
Envelope Printing Customer
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.
Wholesale+ Member
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.
Sample Customer
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.
Packaging Customer
Useful support for flat pack cartons

