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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 37 products
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Blake PurelyEveryday Self Seal Envelopes 90gsm DL White (50 Pack) 13882/50PR

Blake PurelyEveryday Self Seal Envelopes 90gsm DL White 50 Pack 13882 50PR 434540 F
50
Pack
  • Size: Dl
  • Quantity: 50 Envelopes
  • Self-Seal: No moisture needed for closure
  • Paper Weight: 90gsm for quality feel
£2.75
£2.29 ex. VAT
£2.29
£2.75 inc. VAT
(1)
£2.75
£2.29 ex. VAT
£2.29
£2.75 inc. VAT
(1)

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Order now for dispatch tomorrow

Q-Connect Envelope Pocket Self Seal 90gsm C4 White (75 Pack) KF07560

Q Connect Envelope Pocket Self Seal 90gsm C4 White 75 Pack KF07560 610342 F
75
Pack
  • Suitable for A4 documents
  • Secure self-seal closure
  • Made from 90gsm white paper
  • Pack of 75 envelopes
£8.16
£6.80 ex. VAT
£6.80
£8.16 inc. VAT
£8.16
£6.80 ex. VAT
£6.80
£8.16 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelope Pocket Self Seal 90gsm C5 White (150 Pack) KF07558

Q Connect Envelope Pocket Self Seal 90gsm C5 White 150 Pack KF07558 610340 F
150
Pack
  • Size: C5 (162 x 299mm)
  • Paper Weight: 90gsm paper for quality feel
  • Closure: Convenient self-seal – no licking needed!
  • Pack Quantity: 150 envelopes per pack
£8.92
£7.43 ex. VAT
£7.43
£8.92 inc. VAT
£8.92
£7.43 ex. VAT
£7.43
£8.92 inc. VAT

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Order now for dispatch tomorrow

5 Star Office Envelopes Pocket Peel and Seal 90gsm C4 White (10 Pack) FS600423

5 Star Office Envelopes Pocket Peel and Seal 90gsm C4 White 10 Pack FS600423 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
£2.73
£2.27 ex. VAT
£2.27
£2.73 inc. VAT
(1)
£2.73
£2.27 ex. VAT
£2.27
£2.73 inc. VAT
(1)

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Order now for dispatch tomorrow

Blake PurelyEveryday Self Seal Envelopes 90gsm C4 White (50 Pack) 12891/50PR

Blake PurelyEveryday Self Seal Envelopes 90gsm C4 White 50 Pack 12891 50PR 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.

£6.33
£5.27 ex. VAT
£5.27
£6.33 inc. VAT
£6.33
£5.27 ex. VAT
£5.27
£6.33 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelopes Pocket Self Seal 90gsm C5 White (500 Pack) KF3469

Q Connect Envelopes Pocket Self Seal 90gsm C5 White 500 Pack KF3469 106530 F
500
Pack
  • Pack Size: 500 envelopes
  • Paper Weight: 90gsm white paper
  • Size: C5, fits A4 folded or A5 unfolded
  • Closure Type: Self-Seal for secure mailing
£20.65
£17.21 ex. VAT
£17.21
£20.65 inc. VAT
£20.65
£17.21 ex. VAT
£17.21
£20.65 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelopes Self Seal 90gsm C4 White (250 Pack) KF3499

Q Connect Envelopes Self Seal 90gsm C4 White 250 Pack KF3499 104714 F
250
Pack
  • Size: C4
  • Paper Weight: 90gsm white paper
  • Pack Quantity: 250 envelopes
  • Closure: Convenient self-seal flap
£18.79
£15.66 ex. VAT
£15.66
£18.79 inc. VAT
£18.79
£15.66 ex. VAT
£15.66
£18.79 inc. VAT

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Order now for dispatch tomorrow

5 Star Value Envelopes Self Seal 90gsm DL White (1000 Pack) 88469

5 Star Value Envelopes Self Seal 90gsm DL White 1000 Pack 88469 900346 F
1000
Pack
  • Pack of 1000 self-seal DL envelopes
  • Made from 90gsm paper for reliable use
  • Standard DL size - ideal for letters
  • Self-seal closure for a secure and tidy finish
£27.69
£23.07 ex. VAT
£23.07
£27.69 inc. VAT
£27.69
£23.07 ex. VAT
£23.07
£27.69 inc. VAT

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Order now for dispatch tomorrow

Blake PurelyEveryday Envelopes Self Seal 90gsm C6 White (50 Pack) 2602/50PR

Blake PurelyEveryday Envelopes Self Seal 90gsm C6 White 50 Pack 2602 50PR 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
£2.64
£2.20 ex. VAT
£2.20
£2.64 inc. VAT
£2.64
£2.20 ex. VAT
£2.20
£2.64 inc. VAT

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Order now for dispatch tomorrow

Value Envelope Self Seal 90gsm C5 White (500 Pack) WX3469

Value Envelope Self Seal 90gsm C5 White 500 Pack WX3469 369641 F
500
Pack
  • Size: C5 envelopes – ideal for standard correspondence.
  • Paper Quality: Made from 90gsm paper for a crisp, clean finish.
  • Convenient Closure: Features a reliable self-seal for secure mailing.
  • Pack Size: Includes 500 envelopes for exceptional value.
£22.42
£18.68 ex. VAT
£18.68
£22.42 inc. VAT
£22.42
£18.68 ex. VAT
£18.68
£22.42 inc. VAT

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Order now for dispatch tomorrow

Value Envelopes Self Seal 90gsm C4 White (250 Pack) WX3499

Value Envelopes Self Seal 90gsm C4 White 250 Pack WX3499 199658 F
250
Pack
  • Pack Size: 250 white C4 envelopes
  • Self-Seal Closure: No licking needed for secure mailing
  • Paper Weight: Made from durable 90gsm paper
  • Ideal For: Professional business correspondence & invoices
£21.09
£17.57 ex. VAT
£17.57
£21.09 inc. VAT
(1)
£21.09
£17.57 ex. VAT
£17.57
£21.09 inc. VAT
(1)

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Order now for dispatch tomorrow

5 Star Office Envelopes Pocket Self Seal 90gsm C4 White (25 Pack) 934758

5 Star Office Envelopes Pocket Self Seal 90gsm C4 White 25 Pack 934758 409081 F
25
Pack
  • Size: C4 (324x229mm) - Ideal for standard documents
  • Quantity: 25 high-quality envelopes per pack
  • Self-Seal Closure: No need for moistening or tape for easy sealing
  • Pocket Opening: Allows quick and easy access to contents
£2.26
£1.88 ex. VAT
£1.88
£2.26 inc. VAT
£2.26
£1.88 ex. VAT
£1.88
£2.26 inc. VAT

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Order now for dispatch tomorrow

5 Star Value Envelope Pocket Self Seal 90gsm C5 White (500 Pack) 638574

5 Star Value Envelope Pocket Self Seal 90gsm C5 White 500 Pack 638574 889015 F
500
Pack
  • Pack Size: 500 envelopes
  • Envelope Size: C5
  • Closure Type: Self Seal
  • Opening: Pocket (opens on short side)
£14.69
£12.24 ex. VAT
£12.24
£14.69 inc. VAT
£14.69
£12.24 ex. VAT
£12.24
£14.69 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelopes Wallet Self Seal 90gsm DL White (1000 Pack) KF3480

Q Connect Envelopes Wallet Self Seal 90gsm DL White 1000 Pack KF3480 101410 F
1000
Pack
  • Suitable for DL size mail (A4/A5 folded)
  • Self-seal closure for secure mailing
  • Made from high-quality 90gsm white paper
  • Pack of 1000 envelopes
£22.95
£19.12 ex. VAT
£19.12
£22.95 inc. VAT
£22.95
£19.12 ex. VAT
£19.12
£22.95 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelope Wallet Self Seal 90gsm C6 White (1000 Pack) KF3472

Q Connect Envelope Wallet Self Seal 90gsm C6 White 1000 Pack KF3472 126705 F
1000
Pack
  • Pack Size: 1000 self-seal envelopes
  • Document Size: Suitable for A6 or folded A5
  • Paper Weight: 90gsm white paper stock
  • Closure Type: Secure self-seal fastening
£24.48
£20.40 ex. VAT
£20.40
£24.48 inc. VAT
£24.48
£20.40 ex. VAT
£20.40
£24.48 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelopes Pocket Self Seal 90gsm C4 Manilla (250 Pack) KF3419

Q Connect Envelopes Pocket Self Seal 90gsm C4 Manilla 250 Pack KF3419 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.
£18.43
£15.36 ex. VAT
£15.36
£18.43 inc. VAT
£18.43
£15.36 ex. VAT
£15.36
£18.43 inc. VAT

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Order now for dispatch tomorrow

5 Star Value Envelope Pocket Self Seal 90gsm C4 Manilla (250 Pack) 638523

5 Star Value Envelope Pocket Self Seal 90gsm C4 Manilla 250 Pack 638523 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
£16.77
£13.97 ex. VAT
£13.97
£16.77 inc. VAT
£16.77
£13.97 ex. VAT
£13.97
£16.77 inc. VAT

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Order now for dispatch tomorrow

Value Envelope Self Seal 90gsm DL White (1000 Pack) WX3480

Value Envelope Self Seal 90gsm DL White 1000 Pack WX3480 154746 F
1000
Pack
  • Bulk Pack: Contains 1000 white DL envelopes.
  • Paper Quality: Made from 90gsm paper for durability.
  • Convenient Closure: Features a self-seal flap – no licking required!
  • Versatile Size: Designed for A5 documents or folded A4 sheets.
£27.76
£23.13 ex. VAT
£23.13
£27.76 inc. VAT
£27.76
£23.13 ex. VAT
£23.13
£27.76 inc. VAT

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Order now for dispatch tomorrow

5 Star Office Envelopes Pocket Self Seal 90gsm C5 Manilla (500 Pack) J90021

5 Star Office Envelopes Pocket Self Seal 90gsm C5 Manilla 500 Pack J90021 133559 F
500
Pack
  • Pack Size: 500 manilla envelopes
  • Size & Type: C5 (229x162mm) with pocket opening
  • Convenient Closure: Features a reliable self-seal closure
  • Eco-Friendly: Made from 100% recycled materials
£13.21
£11.01 ex. VAT
£11.01
£13.21 inc. VAT
£13.21
£11.01 ex. VAT
£11.01
£13.21 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Machine Envelope Gummed 90gsm 162x238mm White (500 Pack) KF02897

Q Connect Machine Envelope Gummed 90gsm 162x238mm White 500 Pack KF02897 141752 F
500
Pack
  • Suitable for use in mailing machines
  • Contains 500 white, gummed envelopes
  • Oversized C5 size: 162 x 238mm
  • Strong 90gsm paper for reliable use
£25.56
£21.30 ex. VAT
£21.30
£25.56 inc. VAT
£25.56
£21.30 ex. VAT
£21.30
£25.56 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelopes Self Seal 90gsm C4 White (250 Pack) KF02721

Q Connect Envelopes Self Seal 90gsm C4 White 250 Pack KF02721 105706 F
250
Pack
  • Suitable for A4 documents
  • Pack of 250 self-seal envelopes
  • Made from quality 90gsm white paper
  • Easy-seal closure for quick dispatch
£32.46
£27.05 ex. VAT
£27.05
£32.46 inc. VAT
£32.46
£27.05 ex. VAT
£27.05
£32.46 inc. VAT

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Order now for dispatch tomorrow

5 Star Value Envelope Pocket Self Seal 90gsm C4 White (250 Pack) 638558

5 Star Value Envelope Pocket Self Seal 90gsm C4 White 250 Pack 638558 889016 F
250
Pack
  • Pack Size: 250 high-quality envelopes
  • Size: C4 - Ideal for A4 documents folded in three
  • Closure: Reliable self-seal for easy mailing
  • Paper Weight: 90gsm - Durable and professional feel
£20.49
£17.07 ex. VAT
£17.07
£20.49 inc. VAT
£20.49
£17.07 ex. VAT
£17.07
£20.49 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Envelopes Pocket Self Seal 90gsm C5 Manilla (500 Pack) KF3441

Q Connect Envelopes Pocket Self Seal 90gsm C5 Manilla 500 Pack KF3441 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
£21.55
£17.96 ex. VAT
£17.96
£21.55 inc. VAT
£21.55
£17.96 ex. VAT
£17.96
£21.55 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelope Pocket Self Seal 90gsm 381x254mm Manilla (250 Pack) KF3511

Q Connect Envelope Pocket Self Seal 90gsm 381x254mm Manilla 250 Pack KF3511 109849 F
250
Pack
  • Size: 381 x 254mm
  • Paper Weight: 90gsm for reliable performance
  • Closure: Convenient self-seal for secure mailing
  • Eco-Friendly: Made with 75% recycled content
£21.53
£17.94 ex. VAT
£17.94
£21.53 inc. VAT
£21.53
£17.94 ex. VAT
£17.94
£21.53 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelope Pocket Self Seal 90gsm 254x178mm Manilla (250 Pack) KF3445

Q Connect Envelope Pocket Self Seal 90gsm 254x178mm Manilla 250 Pack KF3445 104595 F
250
Pack
  • Size: 254 x 178mm
  • Pack of 250 manilla envelopes
  • Self-seal closure for easy use
  • Made with 75% recycled content
£19.84
£16.53 ex. VAT
£16.53
£19.84 inc. VAT
£19.84
£16.53 ex. VAT
£16.53
£19.84 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelope Pocket Self Seal 90gsm B4 Manilla (250 Pack) KF02893

Q Connect Envelope Pocket Self Seal 90gsm B4 Manilla 250 Pack KF02893 130378 F
250
Pack
  • Size: 353 x 250mm (B4)
  • Quantity: Pack of 250 envelopes
  • Paper Weight: 90gsm
  • Closure: Self-seal adhesive flap
£34.54
£28.78 ex. VAT
£28.78
£34.54 inc. VAT
£34.54
£28.78 ex. VAT
£28.78
£34.54 inc. VAT

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Order now for dispatch tomorrow

5 Star Office Envelopes Pocket Self Seal 90gsm C4 White (250 Pack) F90014

5 Star Office Envelopes Pocket Self Seal 90gsm C4 White 250 Pack F90014 156628 F
250
Pack
  • Size: C4 (324x229mm) - Ideal for standard business documents
  • Self-Seal Closure: No licking needed for quick and easy sealing
  • 90gsm Paper Weight: Durable and reliable quality paper
  • Pack of 250: Provides a large supply for extended use
£25.01
£20.84 ex. VAT
£20.84
£25.01 inc. VAT
£25.01
£20.84 ex. VAT
£20.84
£25.01 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Office Envelopes Pocket Self Seal 90gsm C5 White (500 Pack) B90016

5 Star Office Envelopes Pocket Self Seal 90gsm C5 White 500 Pack B90016 102743 F
500
Pack
  • Size: C5 (229x162mm) - Ideal for standard office correspondence.
  • Quantity: 500 envelopes per pack - Provides a long-lasting supply.
  • Self-Seal Closure: No need for moistening or tape for quick and easy sealing.
  • Pocket Opening: Effortless document insertion and removal from the shorter side.
£26.97
£22.47 ex. VAT
£22.47
£26.97 inc. VAT
£26.97
£22.47 ex. VAT
£22.47
£26.97 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

County Stationery Peel and Seal Envelopes 90gsm C4 White (500 Pack) C509

County Stationery Peel and Seal Envelopes 90gsm C4 White 500 Pack C509 523194 F
500
Pack
  • Pack Size: 500 envelopes (20 sets of 25)
  • Ideal For: Business mail, invoices & important documents
  • Closure Type: Self-seal adhesive for a secure finish
  • Paper Weight: Durable 90gsm paper
£64.03
£53.36 ex. VAT
£53.36
£64.03 inc. VAT
£64.03
£53.36 ex. VAT
£53.36
£64.03 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Office Envelopes Pocket Self Seal 90gsm C4 Manilla (250 Pack) F90022

5 Star Office Envelopes Pocket Self Seal 90gsm C4 Manilla 250 Pack F90022 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
£25.93
£21.61 ex. VAT
£21.61
£25.93 inc. VAT
£25.93
£21.61 ex. VAT
£21.61
£25.93 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Office Envelopes Recycled Pocket Self Seal 90gsm 381x254mm Manilla (250 Pack) 907220

5 Star Office Envelopes Recycled Pocket Self Seal 90gsm 381x254mm Manilla 250 Pack 907220 103014 F
250
Pack
  • Pack of 250: Contains 250 high-quality manilla envelopes
  • Self-Seal Closure: Features a reliable self-seal for convenience
  • Size: 381 x 254mm, ideal for standard documents
  • Sustainable Choice: Made with 100% recycled materials
£26.03
£21.69 ex. VAT
£21.69
£26.03 inc. VAT
£26.03
£21.69 ex. VAT
£21.69
£26.03 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Blake Evolve Envelope Recycled Wallet Self Seal 90gsm DL White (1000 Pack) RD7882

Blake Evolve Envelope Recycled Wallet Self Seal 90gsm DL White 1000 Pack RD7882 110265 F
1000
Pack
  • Eco-Friendly: Made from 100% recycled 90gsm paper
  • Size: DL – fits A4/A5 inserts
  • Convenient: Self-seal closure for quick and secure mailing
  • Quantity: Pack of 1000 white envelopes
£52.28
£43.57 ex. VAT
£43.57
£52.28 inc. VAT
£52.28
£43.57 ex. VAT
£43.57
£52.28 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Eco Envelopes Recycled Pocket Self Seal 90gsm C5 White (500 Pack) 937912

5 Star Eco Envelopes Recycled Pocket Self Seal 90gsm C5 White 500 Pack 937912 463262 F
500
Pack
  • Eco-Friendly: Made from 100% recycled materials.
  • Convenient: Features a self-seal closure – no licking needed!
  • Size: C5 (229 x 162mm)
  • Quantity: Pack of 500 envelopes
£27.23
£22.69 ex. VAT
£22.69
£27.23 inc. VAT
£27.23
£22.69 ex. VAT
£22.69
£27.23 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Envelopes Pocket Self Seal 90gsm C5 White (500 Pack) KF02719

Q Connect Envelopes Pocket Self Seal 90gsm C5 White 500 Pack KF02719 106702 F
500
Pack
  • Pack Size: 500 envelopes (20 packs of 25)
  • Paper Quality: Made from 90gsm white paper for a professional finish
  • Size Compatibility: Fits A4 sheets folded or A5 sheets unfolded
  • Convenient Closure: Features a secure and time-saving self-seal closure
£45.21
£37.67 ex. VAT
£37.67
£45.21 inc. VAT
£45.21
£37.67 ex. VAT
£37.67
£45.21 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Office Envelopes Recycled Pocket Self Seal 90gsm 406x305mm Manilla (250 Pack) 907239

5 Star Office Envelopes Recycled Pocket Self Seal 90gsm 406x305mm Manilla 250 Pack 907239 112936 F
250
Pack
  • Pack of 250: Contains a generous 250 high-quality manilla envelopes
  • Self-Seal Closure: Features a reliable self-seal for quick and easy use
  • Recycled Material: Made with 100% recycled materials for a sustainable choice
  • Size: Measures 406 x 305mm, suitable for standard documents
£42.25
£35.21 ex. VAT
£35.21
£42.25 inc. VAT
£42.25
£35.21 ex. VAT
£35.21
£42.25 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Eco Envelopes Wallet Recycled Self Seal 90gsm DL White (500 Pack) 940398

5 Star Eco Envelopes Wallet Recycled Self Seal 90gsm DL White 500 Pack 940398 477450 F
500
Pack

  • 500 self-seal envelopes per pack – perfect for daily use.

  • Made from 100% recycled materials for environmental sustainability.

  • DL size (220x110mm) and 90gsm – suitable for letters and documents.

  • Features a wallet opening and convenient self-seal closure for easy use.

This item is out of stock

5 Star Eco Envelopes Wallet Recycled Self Seal 90gsm DL White (500 Pack) 940398

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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?