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Plain Envelopes

Plain envelopes can be bought from us in a variety of colours such as white and manilla, as well as multiple sizes like C4, C5 and DL.

Plain Envelopes
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We found 123 products
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Cartridge People Self Seal Envelope 80gsm DL White (500 Pack)

Cartridge People Self Seal Envelope 80gsm DL White 500 Pack 47116 CP
500
Pack
  • Suitable for A4 folded twice in zigzag
  • Secure self-seal fastening
  • White, 80gsm paper
  • Pack of 500
£15.99
£13.32 ex. VAT
£13.32
£15.99 inc. VAT
£15.99
£13.32 ex. VAT
£13.32
£15.99 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Cartridge People Self Seal Envelope 80gsm C6 White (500 Pack)

Cartridge People Self Seal Envelope 80gsm C6 White 500 Pack 47114 CP
500
Pack
  • Suitable for A6, folded A5 documents or A4 folded in four
  • Secure self-seal fastening
  • White, 80gsm paper
  • Pack of 500
£14.99
£12.49 ex. VAT
£12.49
£14.99 inc. VAT
£14.99
£12.49 ex. VAT
£12.49
£14.99 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Cartridge People Self Seal Envelope 80gsm C5 White (25 Pack)

Cartridge People Self Seal Envelope 80gsm C5 White 25 Pack 47119 CP
25
Pack
  • Suitable for A5 paper and A4 folded in half
  • Secure self-seal fastening
  • White, 80gsm paper
  • Pack of 25
£4.99
£4.16 ex. VAT
£4.16
£4.99 inc. VAT
£4.99
£4.16 ex. VAT
£4.16
£4.99 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Cartridge People Self Seal Envelope 80gsm C5 White (500 Pack)

Cartridge People Self Seal Envelope 80gsm C5 White 500 Pack 47120 CP
500
Pack
  • Suitable for A5 paper and A4 folded in half
  • Secure self-seal fastening
  • White, 80gsm paper
  • Pack of 500
£19.99
£16.66 ex. VAT
£16.66
£19.99 inc. VAT
£19.99
£16.66 ex. VAT
£16.66
£19.99 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Cartridge People Self Seal Envelope 120gsm C4 White (250 Pack)

Cartridge People Self Seal Envelope 120gsm C4 White 250 Pack 47123 CP
250
Pack
  • Suitable for A4 paper and A3 folded in half
  • Secure self-seal fastening
  • White, 120gsm paper
  • Pack of 250
£19.99
£16.66 ex. VAT
£16.66
£19.99 inc. VAT
£19.99
£16.66 ex. VAT
£16.66
£19.99 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Cartridge People Gummed Envelope 120gsm C4 White (250 Pack)

Cartridge People Gummed Envelope 120gsm C4 White 250 Pack 47122 CP
250
Pack
  • Suitable for A4 paper and A3 folded in half
  • Secure gummed fastening
  • White, 120gsm paper
  • Pack of 250
£16.99
£14.16 ex. VAT
£14.16
£16.99 inc. VAT
£16.99
£14.16 ex. VAT
£14.16
£16.99 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Purely Everyday Peel and Seal Padded Bubble Pocket Envelopes C5 White (100 Pack)

Purely Everyday Peel and Seal Padded Bubble Pocket Envelopes C5 White 100 Pack
100
Pack
  • Size: C5 (162mm x 229mm)
  • Pack of 100
  • Peel and seal
  • Shock-absorbent inner lining
£10.36
£8.63 ex. VAT
£8.63
£10.36 inc. VAT
£10.36
£8.63 ex. VAT
£8.63
£10.36 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Blake PurelyEveryday Peel & Seal Envelopes 100gsm DL White (50 Pack)

Blake PurelyEveryday Peel Seal Envelopes 100gsm DL White 50 Pack 434293 F
50
Pack
  • Pack Size: 50 Envelopes
  • Closure Type: Peel & Seal
  • Paper Weight: 100gsm for durability
  • Envelope Size: Dl
£5.14
£4.28 ex. VAT
£4.28
£5.14 inc. VAT
(2)
£5.14
£4.28 ex. VAT
£4.28
£5.14 inc. VAT
(2)

Order now for dispatch Monday

Order now for dispatch Monday

Blake PurelyEveryday Self Seal Envelopes 90gsm DL White (50 Pack)

Blake PurelyEveryday Self Seal Envelopes 90gsm DL White 50 Pack 434540 F
50
Pack
  • Size: Dl
  • Quantity: 50 Envelopes
  • Self-Seal: No moisture needed for closure
  • Paper Weight: 90gsm for quality feel
£3.58
£2.98 ex. VAT
£2.98
£3.58 inc. VAT
(1)
£3.58
£2.98 ex. VAT
£2.98
£3.58 inc. VAT
(1)

Order now for dispatch Monday

Order now for dispatch Monday

Blake PurelyEveryday Peel & Seal White Envelopes 100gsm C5 White (100 Pack)

Blake PurelyEveryday Peel Seal White Envelopes 100gsm C5 White 100 Pack 752568 F
100
Pack
  • Size: C5
  • Quantity: 100 Envelopes
  • Closure: Peel & Seal - no licking needed!
  • Paper Weight: 100gsm for a professional feel
£9.94
£8.28 ex. VAT
£8.28
£9.94 inc. VAT
£9.94
£8.28 ex. VAT
£8.28
£9.94 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

5 Star Office Envelopes Wallet Peel and Seal 100gsm DL White (500 Pack)

5 Star Office Envelopes Wallet Peel and Seal 100gsm DL White 500 Pack 104769 F
500
Pack
  • Size: DL (220x110mm) - Ideal for standard documents
  • Quantity: 500 envelopes per pack – a long-lasting supply
  • Peel and Seal Closure: Saves time and ensures a secure seal
  • Wallet Opening: Allows easy access to contents
£16.13
£13.44 ex. VAT
£13.44
£16.13 inc. VAT
(2)
£16.13
£13.44 ex. VAT
£13.44
£16.13 inc. VAT
(2)

Order now for dispatch Monday

Order now for dispatch Monday

Blake PurelyEveryday Self Seal Envelopes 90gsm C4 White (50 Pack)

Blake PurelyEveryday Self Seal Envelopes 90gsm C4 White 50 Pack 600528 F
50
Pack

  • Pack Size: Contains 50 high-quality, self-seal envelopes.

  • Convenience: Self-seal design eliminates licking or moistening.

  • Size & Use: C4 size, ideal for documents and letters.

  • Durability: Made with 90gsm paper for a premium feel and reliability.

£7.66
£6.38 ex. VAT
£6.38
£7.66 inc. VAT
£7.66
£6.38 ex. VAT
£6.38
£7.66 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Blake PurelyEveryday Self Seal Envelopes 80gsm DL White (50 Pack)

Blake PurelyEveryday Self Seal Envelopes 80gsm DL White 50 Pack 434301 F
50
Pack
  • Pack Size: 50 envelopes
  • Size & Weight: DL, 80gsm paper
  • Convenient: Self-seal closure - no moisture needed
  • Colour: Classic white for a professional finish
£3.58
£2.98 ex. VAT
£2.98
£3.58 inc. VAT
£3.58
£2.98 ex. VAT
£2.98
£3.58 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Blake PurelyEveryday Envelopes Self Seal 90gsm C6 White (50 Pack)

Blake PurelyEveryday Envelopes Self Seal 90gsm C6 White 50 Pack 434537 F
50
Pack
  • Pack Size: 50 Envelopes
  • Envelope Size: C6
  • Paper Weight: 90gsm for a professional feel
  • Convenient Closure: Self-seal – no moistening needed
£3.58
£2.98 ex. VAT
£2.98
£3.58 inc. VAT
£3.58
£2.98 ex. VAT
£2.98
£3.58 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

5 Star Office Envelopes Pocket Peel and Seal 90gsm C4 White (10 Pack)

5 Star Office Envelopes Pocket Peel and Seal 90gsm C4 White 10 Pack 912084 F
10
Pack
  • Pack of 10 high-quality C4 envelopes
  • Suitable for A4 documents
  • 324 x 229mm dimensions
  • Peel and seal closure for secure mailing
£2.98
£2.48 ex. VAT
£2.48
£2.98 inc. VAT
(1)
£2.98
£2.48 ex. VAT
£2.48
£2.98 inc. VAT
(1)

Order now for dispatch Monday

Order now for dispatch Monday

5 Star Office Envelopes Pocket Peel/Seal 100gsm C5 White (500 Pack)

5 Star Office Envelopes Pocket Peel Seal 100gsm C5 White 500 Pack 160514 F
500
Pack
  • Size: C5 (229x162mm) for standard mailings.
  • Peel & Seal Closure: Quick and effortless fastening.
  • Pocket Opening: Easy insertion and removal of contents.
  • Pack of 500: Ideal for busy offices and frequent use.
£19.96
£16.63 ex. VAT
£16.63
£19.96 inc. VAT
(1)
£19.96
£16.63 ex. VAT
£16.63
£19.96 inc. VAT
(1)

Order now for dispatch Monday

Order now for dispatch Monday

5 Star Office Envelopes Plain Wallet Self Seal 80gsm DL White (25 Pack)

5 Star Office Envelopes Plain Wallet Self Seal 80gsm DL White 25 Pack 912094 F
25
Pack
  • Pack of 25 plain white wallet envelopes
  • Suitable for DL size mail & folded A4/A5 sheets
  • 80gsm paper for reliable performance
  • Features a simple and secure self-seal closure
£3.58
£2.98 ex. VAT
£2.98
£3.58 inc. VAT
(1)
£3.58
£2.98 ex. VAT
£2.98
£3.58 inc. VAT
(1)

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelopes Gusset Peel and Seal 120gsm C4 White (125 Pack)

Q Connect Envelopes Gusset Peel and Seal 120gsm C4 White 125 Pack 142684 F
125
Pack
  • Suitable for A4 documents
  • 125 envelopes per pack
  • Features a 25mm expanding gusset
  • Secure peel and seal closure
£26.74
£22.28 ex. VAT
£22.28
£26.74 inc. VAT
£26.74
£22.28 ex. VAT
£22.28
£26.74 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelopes Pocket Self Seal 80gsm C4 Manilla (250 Pack)

Q Connect Envelopes Pocket Self Seal 80gsm C4 Manilla 250 Pack 139796 F
250
Pack
  • Contains 250 manilla envelopes
  • Ideal for A4 documents
  • Features an easy-seal, secure flap
  • Made with 85% recycled content
£18.10
£15.08 ex. VAT
£15.08
£18.10 inc. VAT
(1)
£18.10
£15.08 ex. VAT
£15.08
£18.10 inc. VAT
(1)

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelope Wallet Self Seal 80gsm DL White (250 Pack)

Q Connect Envelope Wallet Self Seal 80gsm DL White 250 Pack 610338 F
250
Pack
  • Size: DL - Fits standard A4/A5 folded documents.
  • 250 Pack: Large quantity for frequent use.
  • 80gsm White Paper: Professional quality and finish.
  • Self-Seal Closure: Secure, tamper-evident & saves time.
£9.34
£7.78 ex. VAT
£7.78
£9.34 inc. VAT
£9.34
£7.78 ex. VAT
£7.78
£9.34 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelope 25mm Gusset Peel and Seal 120gsm C4 Manilla (100 Pack)

Q Connect Envelope 25mm Gusset Peel and Seal 120gsm C4 Manilla 100 Pack 123713 F
100
Pack
  • Suitable for A4 documents
  • 25mm expanding gusset for bulky items
  • Strong peel and seal closure
  • Pack of 100 x 120gsm manilla envelopes
£17.92
£14.93 ex. VAT
£14.93
£17.92 inc. VAT
£17.92
£14.93 ex. VAT
£14.93
£17.92 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Basildon Bond Self Seal Envelope C5 White (50 Pack)

Basildon Bond Self Seal Envelope C5 White 50 Pack 113599 F
50
Pack
  • 50 Pack
  • Recycled paper
  • Weight: 120gsm
  • Peel and stick closure
£12.85
£10.71 ex. VAT
£10.71
£12.85 inc. VAT
£12.85
£10.71 ex. VAT
£10.71
£12.85 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelopes Pocket Self Seal 115gsm C5 Manilla (250 Pack)

Q Connect Envelopes Pocket Self Seal 115gsm C5 Manilla 250 Pack 106513 F
250
Pack
  • Pack Size: 250 manilla envelopes
  • Paper Weight: Durable 115gsm paper
  • Size: C5, fits A4 folded or A5 unfolded
  • Closure: Convenient self-seal for secure mailing
£14.14
£11.78 ex. VAT
£11.78
£14.14 inc. VAT
£14.14
£11.78 ex. VAT
£11.78
£14.14 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Basildon Bond Pocket Envelope 120gsm C4 White (50 Pack)

Basildon Bond Pocket Envelope 120gsm C4 White 50 Pack 144082 F
50
Pack
  • Pack of 50 plain white C4 envelopes
  • 120gsm Recycled Paper - environmentally conscious choice
  • A4 Document Size - suitable for unfolded A4
  • Peel & Seal Closure & Opaque Green Interior for secure, confidential mailing
£22.33
£18.61 ex. VAT
£18.61
£22.33 inc. VAT
£22.33
£18.61 ex. VAT
£18.61
£22.33 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Value Envelope Manilla Self Seal 80gsm C4 Manilla (250 Pack)

Value Envelope Manilla Self Seal 80gsm C4 Manilla 250 Pack 102795 F
250
Pack
  • C4 Size: Suitable for standard business correspondence and unfolded A4 documents.
  • Self-Seal: Features a convenient self-adhesive flap for quick, easy closure – no moisture needed.
  • Durable Quality: Crafted from high-quality 80gsm paper for a professional finish.
  • Large Pack: Contains 250 envelopes – ideal for both home and business use.
£18.58
£15.48 ex. VAT
£15.48
£18.58 inc. VAT
£18.58
£15.48 ex. VAT
£15.48
£18.58 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

5 Star Office Envelopes Recycled Wallet Self Seal Lightweight 80gsm C6 White (1000 Pack)

5 Star Office Envelopes Recycled Wallet Self Seal Lightweight 80gsm C6 White 1000 Pack 121386 F
1000
Pack
  • Size C6 (114x162mm) - ideal for standard correspondence.
  • Pack of 1000 - provides a large supply for office use.
  • Self-Seal & Wallet Opening - for easy and secure document handling.
  • 100% Recycled Materials - a sustainable stationery choice.
£30.43
£25.36 ex. VAT
£25.36
£30.43 inc. VAT
£30.43
£25.36 ex. VAT
£25.36
£30.43 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

5 Star Office Envelopes Gusset 25mm Peel and Seal 115gsm C4 Manilla (125 Pack)

5 Star Office Envelopes Gusset 25mm Peel and Seal 115gsm C4 Manilla 125 Pack 140107 F
125
Pack
  • Pack of 125 manilla C4 envelopes
  • Peel & Seal closure for quick and easy use
  • 25mm gusset accommodates bulkier mail
  • 115gsm paper weight for reliable quality
£21.70
£18.08 ex. VAT
£18.08
£21.70 inc. VAT
£21.70
£18.08 ex. VAT
£18.08
£21.70 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Value Envelope Manilla Self Seal 115gsm C4 Manilla (250 Pack)

Value Envelope Manilla Self Seal 115gsm C4 Manilla 250 Pack 224100 F
250
Pack

  • Pack of 250 C4 Manilla Self Seal Envelopes

  • Fits unfolded A4 documents

  • Made from 115gsm heavyweight paper for a professional finish

  • Quick & easy self-adhesive flap for secure sealing

£22.54
£18.78 ex. VAT
£18.78
£22.54 inc. VAT
£22.54
£18.78 ex. VAT
£18.78
£22.54 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Value Envelope Self Seal 75gsm C5 Manilla (500 Pack)

Value Envelope Self Seal 75gsm C5 Manilla 500 Pack 242498 F
500
Pack
  • Pack Size: 500 self-seal manilla envelopes
  • Envelope Size: C5 – fits A5 & folded A4
  • Material: Durable 75gsm Manilla
  • Closure Type: Convenient Self-Seal – no licking needed!
£18.82
£15.68 ex. VAT
£15.68
£18.82 inc. VAT
£18.82
£15.68 ex. VAT
£15.68
£18.82 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelope Wallet Gummed 70gsm 89mm x 152mm Manilla (1000 Pack)

Q Connect Envelope Wallet Gummed 70gsm 89mm x 152mm Manilla 1000 Pack 127834 F
1000
Pack
  • Size: 89mm x 152mm
  • Pack of 1000 manilla envelopes
  • Made with 85% Recycled Manilla
  • Secure gummed flap closure
£24.46
£20.38 ex. VAT
£20.38
£24.46 inc. VAT
£24.46
£20.38 ex. VAT
£20.38
£24.46 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

5 Star Value Envelope Pocket Self Seal 80gsm C5 Manilla (500 Pack)

5 Star Value Envelope Pocket Self Seal 80gsm C5 Manilla 500 Pack 889369 F
500
Pack
  • Size: C5
  • Quantity: 500 envelopes per pack
  • Self-seal closure for easy mailing
  • Pocket opening on the shorter side
£19.77
£16.47 ex. VAT
£16.47
£19.77 inc. VAT
£19.77
£16.47 ex. VAT
£16.47
£19.77 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

CTS Envelope Plain Non Window 80gsm C5 Manilla (500 Pack)

CTS Envelope Plain Non Window 80gsm C5 Manilla 500 Pack 809033 F
500
Pack
  • Pack Size: 500 high-quality C5 manilla envelopes
  • Convenient Closure: Features a quick and easy self-seal adhesive flap
  • Durable Material: Crafted from 80gsm manilla paper for reliable postage
  • Accommodates A5: Designed to comfortably fit A5 sized documents
£16.22
£13.52 ex. VAT
£13.52
£16.22 inc. VAT
£16.22
£13.52 ex. VAT
£13.52
£16.22 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelopes Pocket Self Seal 90gsm C4 Manilla (250 Pack)

Q Connect Envelopes Pocket Self Seal 90gsm C4 Manilla 250 Pack 126348 F
250
Pack
  • Size: C4 - Ideal for A4 documents.
  • Quantity: 250 envelopes per pack.
  • Material: Made from 85% recycled manilla.
  • Closure: Features a convenient self-seal flap.
£19.54
£16.28 ex. VAT
£16.28
£19.54 inc. VAT
£19.54
£16.28 ex. VAT
£16.28
£19.54 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelopes Plain Wallet Peel and Seal 100gsm DL White (500 Pack)

Q Connect Envelopes Plain Wallet Peel and Seal 100gsm DL White 500 Pack 280226 F
500
Pack
  • 500 pack of plain white wallet envelopes
  • Made from quality 100gsm paper
  • Secure peel and seal closure – no licking!
  • Accommodates A4/A5 sheets folded
£19.54
£16.28 ex. VAT
£16.28
£19.54 inc. VAT
£19.54
£16.28 ex. VAT
£16.28
£19.54 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Q-Connect Envelopes Pocket Self Seal 100gsm C5 White (500 Pack)

Q Connect Envelopes Pocket Self Seal 100gsm C5 White 500 Pack 147783 F
500
Pack
  • Pack Size: 500 envelopes per pack
  • Paper Quality: Made from 100gsm white paper
  • Size Compatibility: Fits A4 (folded) or A5 (unfolded) sheets
  • Closure Type: Features a convenient self-seal closure
£21.46
£17.88 ex. VAT
£17.88
£21.46 inc. VAT
£21.46
£17.88 ex. VAT
£17.88
£21.46 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

5 Star Value Envelope Pocket Self Seal 100gsm C5 White (500 Pack)

5 Star Value Envelope Pocket Self Seal 100gsm C5 White 500 Pack 889366 F
500
Pack
  • Size: C5
  • Quantity: 500 envelopes per pack
  • Convenient: Self-seal closure for easy use
  • Easy Access: Pocket opening design
£21.82
£18.18 ex. VAT
£18.18
£21.82 inc. VAT
£21.82
£18.18 ex. VAT
£18.18
£21.82 inc. VAT

Order now for dispatch Monday

Order now for dispatch Monday

Plain Envelopes

Find plain envelopes for your mailing and office requirements. Our extensive range includes a variety of sizes, including DL, C4, C5 and B4. Peel and seal and self seal options are also available.

We stock bulk packs to suit businesses and home offices, as well as a wide range of quantities. Choose from different paper weights and colours like white and manilla.

We have the right envelope for your letters, documents and invoices. Envelopes with recycled paper are also available here.

Find more types of envelopes in our full range.

Frequently Asked Questions

Q. Will C5 envelopes fit A4 paper?

Q. What is a windowless envelope?