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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 59 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
£13.33 ex. VAT
£13.33
£15.99 inc. VAT
£15.99
£13.33 ex. VAT
£13.33
£15.99 inc. VAT

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Order now for dispatch today

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

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Order now for dispatch today

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 today

Order now for dispatch today

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 today

Order now for dispatch today

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 today

Order now for dispatch today

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

Q Connect Envelope 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)

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Order now for dispatch today

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 today

Order now for dispatch today

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

Q Connect Envelope 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

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Order now for dispatch today

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

Blake PurelyEveryday Self Seal Envelope 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 today

Order now for dispatch today

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

Blake PurelyEveryday Self Seal Envelope 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 today

Order now for dispatch today

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

Q Connect Envelope 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 today

Order now for dispatch today

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

Blake PurelyEveryday Envelope 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 today

Order now for dispatch today

Q-Connect Envelope Pocket Self Seal 115gsm C3 Manilla (125 Pack)

Q Connect Envelope Pocket Self Seal 115gsm C3 Manilla 125 Pack 125942 F
125
Pack
  • Size: 457x324mm (C3) - Ideal for larger correspondence.
  • Strong & Reliable: Crafted from 115gsm paper for secure transit.
  • Self-Seal Closure: Quick and easy to use - no moisture needed.
  • Pack of 125: Perfect for both business and home use.
£27.82
£23.18 ex. VAT
£23.18
£27.82 inc. VAT
£27.82
£23.18 ex. VAT
£23.18
£27.82 inc. VAT

Order now for dispatch today

Order now for dispatch today

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 today

Order now for dispatch today

Q-Connect Envelope Pocket Self Seal 115gsm C4 Manilla (250 Pack)

Q Connect Envelope Pocket Self Seal 115gsm C4 Manilla 250 Pack 160611 F
250
Pack
  • Suitable for A4 documents
  • Pack of 250 manilla envelopes
  • Made with 85% recycled manilla
  • Heavyweight 115gsm paper with self-seal closure
£20.33
£16.94 ex. VAT
£16.94
£20.33 inc. VAT
£20.33
£16.94 ex. VAT
£16.94
£20.33 inc. VAT

Order now for dispatch today

Order now for dispatch today

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 today

Order now for dispatch today

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 today

Order now for dispatch today

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

Q Connect Envelope 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 today

Order now for dispatch today

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 today

Order now for dispatch today

Q-Connect Envelope Pocket Self Seal 90gsm C5 Manilla (500 Pack)

Q Connect Envelope Pocket Self Seal 90gsm C5 Manilla 500 Pack 109720 F
500
Pack
  • Pack Size: 500 manilla envelopes
  • Size: C5, fits A4 folded in thirds or A5 unfolded
  • Paper Weight: 90gsm for reliable use
  • Closure Type: Convenient self-seal closure
£21.58
£17.98 ex. VAT
£17.98
£21.58 inc. VAT
£21.58
£17.98 ex. VAT
£17.98
£21.58 inc. VAT

Order now for dispatch today

Order now for dispatch today

Q-Connect Envelope Pocket Self Seal 80gsm C5 Manilla (500 Pack)

Q Connect Envelope Pocket Self Seal 80gsm C5 Manilla 500 Pack 122157 F
500
Pack
  • Pack Size: 500 envelopes per pack
  • Size & Compatibility: C5 size, fits A4 folded or A5 unfolded
  • Material: Durable 80gsm paper
  • Convenience: Features a self-seal closure for easy use
£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 today

Order now for dispatch today

5 Star Value Envelope Pocket Self Seal 90gsm C4 Manilla (250 Pack)

5 Star Value Envelope Pocket Self Seal 90gsm C4 Manilla 250 Pack 889367 F
250
Pack
  • Pack Size: 250 manilla envelopes
  • Closure Type: Self-seal for convenience
  • Envelope Size: C4
  • Opening: Pocket access on the shorter side
£20.62
£17.18 ex. VAT
£17.18
£20.62 inc. VAT
£20.62
£17.18 ex. VAT
£17.18
£20.62 inc. VAT

Order now for dispatch today

Order now for dispatch today

5 Star Office Envelope Pocket Self Seal 90gsm C5 Manilla (500 Pack)

5 Star Office Envelope Pocket Self Seal 90gsm C5 Manilla 500 Pack 133559 F
500
Pack
  • Pack Size: 500 manilla envelopes
  • Size & Type: C5 (229x162mm) with pocket opening
  • Convenient Closure: Features a reliable self-seal closure
£18.66
£15.55 ex. VAT
£15.55
£18.66 inc. VAT
£18.66
£15.55 ex. VAT
£15.55
£18.66 inc. VAT

Order now for dispatch today

Order now for dispatch today

Q-Connect Envelope Recycled Self Seal 100gsm DL White (500 Pack)

Q Connect Envelope Recycled Self Seal 100gsm DL White 500 Pack 107322 F
500
Pack
  • Pack of 500: Contains 500 white, self-seal wallet envelopes
  • Made from 100% recycled 100gsm paper
  • DL Size: Suitable for A4/A5 sheets folded appropriately
  • Self-Seal: Convenient closure for secure and efficient mailing
£20.98
£17.48 ex. VAT
£17.48
£20.98 inc. VAT
£20.98
£17.48 ex. VAT
£17.48
£20.98 inc. VAT

Order now for dispatch today

Order now for dispatch today

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
£16.48 ex. VAT
£16.48
£19.77 inc. VAT
£19.77
£16.48 ex. VAT
£16.48
£19.77 inc. VAT

Order now for dispatch today

Order now for dispatch today

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

5 Star Office Envelope 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 today

Order now for dispatch today

5 Star Office Envelope Pocket Self Seal 115gsm C4 Manilla (250 Pack)

5 Star Office Envelope Pocket Self Seal 115gsm C4 Manilla 250 Pack 130612 F
250
Pack
  • Pack Size: 250 C4 (324x229mm) envelopes
  • Convenient Closure: Features a reliable self-seal for easy use.
  • Paper Weight: Made from durable 115gsm paper.
£20.51
£17.09 ex. VAT
£17.09
£20.51 inc. VAT
£20.51
£17.09 ex. VAT
£17.09
£20.51 inc. VAT

Order now for dispatch today

Order now for dispatch today

Q-Connect Envelope Pocket Self Seal 115gsm 381mm x 254mm Manilla (250 Pack)

Q Connect Envelope Pocket Self Seal 115gsm 381mm x 254mm Manilla 250 Pack 151596 F
250
Pack
  • Size: 381 x 254mm
  • Paper Weight: 115gsm for reliable protection
  • Convenient: Self-seal closure for quick use
£26.98
£22.48 ex. VAT
£22.48
£26.98 inc. VAT
£26.98
£22.48 ex. VAT
£22.48
£26.98 inc. VAT

Order now for dispatch today

Order now for dispatch today

Q-Connect Envelope Wallet Self Seal 100gsm DL White (1000 Pack)

Q Connect Envelope Wallet Self Seal 100gsm DL White 1000 Pack 119404 F
1000
Pack
  • Pack of 1000: Contains 1000 white wallet envelopes.
  • DL Size: Suitable for A4/A5 folded sheets.
  • 100gsm Paper: Crafted from quality 100gsm white paper.
  • Self-Seal Closure: Features a convenient and secure self-seal.
£27.48
£22.90 ex. VAT
£22.90
£27.48 inc. VAT
£27.48
£22.90 ex. VAT
£22.90
£27.48 inc. VAT

Order now for dispatch today

Order now for dispatch today

Q-Connect Envelope Wallet Self Seal 120gsm DL White (1000 Pack)

Q Connect Envelope Wallet Self Seal 120gsm DL White 1000 Pack 163628 F
1000
Pack
  • Pack of 1000 self-seal DL envelopes
  • Suitable for A4/A5 sheet sizes
  • Made from durable 120gsm white paper
  • Convenient self-seal closure for easy mailing
£29.28
£24.40 ex. VAT
£24.40
£29.28 inc. VAT
£29.28
£24.40 ex. VAT
£24.40
£29.28 inc. VAT

Order now for dispatch today

Order now for dispatch today

Q-Connect Envelope Pocket Self Seal 115gsm 406mm x 305mm Manilla (250 Pack)

Q Connect Envelope Pocket Self Seal 115gsm 406mm x 305mm Manilla 250 Pack 156398 F
250
Pack
  • Size: 406 x 305mm
  • Paper Weight: 115gsm for reliable protection
  • Closure: Convenient self-seal for quick use
  • Pack: 250 manilla envelopes, 75% recycled
£31.90
£26.58 ex. VAT
£26.58
£31.90 inc. VAT
£31.90
£26.58 ex. VAT
£26.58
£31.90 inc. VAT

Order now for dispatch today

Order now for dispatch today

5 Star Office Envelope Pocket Self Seal 90gsm C4 Manilla (250 Pack)

5 Star Office Envelope Pocket Self Seal 90gsm C4 Manilla 250 Pack 105620 F
250
Pack
  • Pack Size: 250 C4 (324x229mm) manilla envelopes
  • Convenient Closure: Features a reliable self-seal for quick fastening
  • Paper Quality: Made from 90gsm paper with 100% recycled materials
  • Easy Access: Pocket opening along the shorter side for simple content retrieval
£28.60
£23.83 ex. VAT
£23.83
£28.60 inc. VAT
£28.60
£23.83 ex. VAT
£23.83
£28.60 inc. VAT

Order now for dispatch today

Order now for dispatch today

Q-Connect Envelope Pocket Self Seal 90gsm B4 Manilla (250 Pack)

Q Connect Envelope Pocket Self Seal 90gsm B4 Manilla 250 Pack 130378 F
250
Pack
  • Size: 353 x 250mm (B4)
  • Quantity: Pack of 250 envelopes
  • Paper Weight: 90gsm
  • Closure: Self-seal adhesive flap
£28.47
£23.73 ex. VAT
£23.73
£28.47 inc. VAT
£28.47
£23.73 ex. VAT
£23.73
£28.47 inc. VAT

Order now for dispatch today

Order now for dispatch today

Evolve Envelope Recycled Pocket Self Seal 100gsm C4 White (250 Pack)

Evolve Envelope Recycled Pocket Self Seal 100gsm C4 White 250 Pack 181440 F
250
Pack
  • Made from 100% recycled 100gsm paper.
  • Size & Format: C4 size, designed for A4 documents.
  • Convenient Closure: Features a quick and easy self-seal closure.
  • Pack Quantity: Includes 250 white envelopes per pack.
£36.34
£30.28 ex. VAT
£30.28
£36.34 inc. VAT
£36.34
£30.28 ex. VAT
£30.28
£36.34 inc. VAT

Order now for dispatch today

Order now for dispatch today

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

5 Star Office Envelope 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 today

Order now for dispatch today

New Guardian Envelope Pocket Self Seal 130gsm C5 Manilla (250 Pack)

New Guardian Envelope Pocket Self Seal 130gsm C5 Manilla 250 Pack 139227 F
250
Pack
  • Pack Size: 250 envelopes
  • Envelope Size: C5
  • Paper Weight: 130gsm for durability
  • Closure Type: Self-seal for easy & secure use
£38.70
£32.25 ex. VAT
£32.25
£38.70 inc. VAT
£38.70
£32.25 ex. VAT
£32.25
£38.70 inc. VAT

Order now for dispatch today

Order now for dispatch today

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?