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Window Envelopes

Find a wide range of window envelopes at Cartridge People, including C4 and DL window envelopes.

Window Envelopes
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We found 27 products
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Self Seal DL Windowed Envelope 90gsm - White (1000 Pack) WX3481

Self Seal DL Windowed Envelope 90gsm White 1000 Pack WX3481 256048 F
1000
Pack
  • Bulk pack of 1000 white DL window envelopes.
  • Fits A5 documents (folded once) or A4 (folded twice).
  • Features a self-seal flap for quick, secure closure.
  • Made from quality 90gsm paper with a clear window.
£23.62
£19.68 ex. VAT
£19.68
£23.62 inc. VAT
£23.62
£19.68 ex. VAT
£19.68
£23.62 inc. VAT

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Order now for dispatch tomorrow

Blake Purely Everyday Self Seal DL Windowed Envelope 90gsm - White (50 Pack) 13884/50PR

Blake Purely Everyday Self Seal DL Windowed Envelope 90gsm White 50 Pack 13884 50PR 454193 F
50
Pack
  • Pack Size: 50 envelopes
  • Paperweight: 90gsm for quality feel
  • Size: DL – standard letter size
  • Closure: Self-seal for convenience
£2.99
£2.49 ex. VAT
£2.49
£2.99 inc. VAT
£2.99
£2.49 ex. VAT
£2.49
£2.99 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Self Seal C5 Windowed Pocket Envelope 90gsm - White (500 Pack) 2820

Q Connect Self Seal C5 Windowed Pocket Envelope 90gsm White 500 Pack 2820 152998 F
500
Pack
  • Pack Size: 500 envelopes per pack
  • Paper Quality: Made from 90gsm white paper
  • Window Feature: Includes a 90 x 45mm window for address visibility
  • Self Seal Closure
  • Document Compatibility: Ideal for A4 (folded) or A5 (unfolded) documents
£19.83
£16.52 ex. VAT
£16.52
£19.83 inc. VAT
£19.83
£16.52 ex. VAT
£16.52
£19.83 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Self Seal C5 Windowed Envelope 90gsm - White (500 Pack)

Self Seal C5 Windowed Envelope 90gsm White 500 Pack 755368 F
500
Pack
  • Pack of 500: Ideal for both business and personal mailing needs.
  • C5 Size & 90gsm: Standard C5 envelope size with a quality 90gsm paper weight.
  • Self-Seal & Window: Features a convenient self-seal closure and clear window.
  • UK Made & Sustainable: Ethically sourced, renewable paper manufactured in the UK.
£18.86
£15.72 ex. VAT
£15.72
£18.86 inc. VAT
£18.86
£15.72 ex. VAT
£15.72
£18.86 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Self Seal C5 Windowed Pocket Envelope 90gsm - White (500 Pack) 9000020

Q Connect Self Seal C5 Windowed Pocket Envelope 90gsm White 500 Pack 9000020 461801 F
500
Pack
  • Size C5 (229 x 162mm) - Fits A5 & folded A4
  • 500 Pack - Ideal for business & home use
  • 90gsm Paper Weight - Durable & reliable
  • Self-Seal & Window - Convenient & professional
£19.32
£16.10 ex. VAT
£16.10
£19.32 inc. VAT
£19.32
£16.10 ex. VAT
£16.10
£19.32 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Self Seal C4 Windowed Envelope 90gsm - White (250 Pack) KF3501

Q Connect Self Seal C4 Windowed Envelope 90gsm White 250 Pack KF3501 113881 F
250
Pack
  • Suitable for A4 documents
  • Self-seal closure for easy and secure mailing
  • Contains 250 envelopes per pack
  • Crafted from 90gsm white paper
£21.31
£17.76 ex. VAT
£17.76
£21.31 inc. VAT
£21.31
£17.76 ex. VAT
£17.76
£21.31 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Self Seal C5 Windowed Envelope 90gsm - White (150 Pack) KF07559

Q Connect Self Seal C5 Windowed Envelope 90gsm White 150 Pack KF07559 610341 F
150
Pack
  • Size: 162 x 299mm (C5)
  • Holds A5 documents or folded A4 sheets
  • Self-seal adhesive flap for secure closure
  • Pack of 150 classic white envelopes
£7.55
£6.29 ex. VAT
£6.29
£7.55 inc. VAT
£7.55
£6.29 ex. VAT
£6.29
£7.55 inc. VAT

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Order now for dispatch tomorrow

5 Star Value Self Seal C5 Windowed Pocket Envelope 90gsm - White (500 Pack) 652516

5 Star Value Self Seal C5 Windowed Pocket Envelope 90gsm White 500 Pack 652516 889018 F
500
Pack
  • Size: 229x162mm C5 envelopes – ideal for standard letters
  • Paper Weight: Crafted from durable 90gsm paper
  • Convenient Seal: Features a quick and easy Pocket Press Seal
  • Large Pack: Includes a generous 500 envelopes per pack
£21.78
£18.15 ex. VAT
£18.15
£21.78 inc. VAT
£21.78
£18.15 ex. VAT
£18.15
£21.78 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Self Seal C4 Windowed Envelope 90gsm - White (75 Pack) KF07561

Q Connect Self Seal C4 Windowed Envelope 90gsm White 75 Pack KF07561 610343 F
75
Pack
  • Pack of 75 white envelopes
  • Fits A4 documents
  • 90gsm paper weight for a professional feel
  • Self-seal flap & clear window for easy mailing
£7.05
£5.87 ex. VAT
£5.87
£7.05 inc. VAT
£7.05
£5.87 ex. VAT
£5.87
£7.05 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Self Seal C4 Windowed Envelope 90gsm - White (250 Pack) WX3501

Self Seal C4 Windowed Envelope 90gsm White 250 Pack WX3501 187888 F
250
Pack
  • C4 Size: Ideal for A4 documents.
  • 90gsm Paper: Offers a professional finish.
  • Self-Seal Closure: Ensures secure and efficient mailing.
  • Clear Window: 40 x 105mm for easy address visibility.
£21.50
£17.92 ex. VAT
£17.92
£21.50 inc. VAT
£21.50
£17.92 ex. VAT
£17.92
£21.50 inc. VAT

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Order now for dispatch tomorrow

5 Star Office Peel and Seal C4 Windowed Envelope 90gsm - White (10 Pack) FS600450

5 Star Office Peel and Seal C4 Windowed Envelope 90gsm White 10 Pack FS600450 912083 F
10
Pack
  • Pack Size: 10 high-quality C4 envelopes
  • Paper Weight: 90gsm white paper
  • Closure Type: Convenient peel and seal
  • Dimensions: 324 x 229mm (C4 size)
£3.01
£2.51 ex. VAT
£2.51
£3.01 inc. VAT
£3.01
£2.51 ex. VAT
£2.51
£3.01 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Self Seal DL Windowed Envelope 90gsm - White (1000 Pack) KF3481

Q Connect Self Seal DL Windowed Envelope 90gsm White 1000 Pack KF3481 156467 F
1000
Pack
  • Pack Size: 1000 envelopes per pack
  • Paper Weight: Made from 90gsm white paper
  • Closure Type: Convenient self-seal closure
  • Size Compatibility: DL size, fits A4/A5 folded sheets
£26.70
£22.25 ex. VAT
£22.25
£26.70 inc. VAT
£26.70
£22.25 ex. VAT
£22.25
£26.70 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Gummed C5 Windowed Machine Envelope 90gsm - White (500 Pack) KF02898

Q Connect Gummed C5 Windowed Machine Envelope 90gsm White 500 Pack KF02898 106366 F
500
Pack
  • Suitable for mailing machines
  • Dimensions: 162 x 238mm (Oversized C5)
  • 500 envelopes per pack
  • Durable 90gsm paper
£21.06
£17.55 ex. VAT
£17.55
£21.06 inc. VAT
£21.06
£17.55 ex. VAT
£17.55
£21.06 inc. VAT

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Order now for dispatch tomorrow

Self Seal C4 Windowed Envelope 90gsm - Manilla (250 Pack) C490250MW

Self Seal C4 Windowed Envelope 90gsm Manilla 250 Pack C490250MW 809032 F
250
Pack
  • Quantity: 250 high-quality envelopes per pack
  • Size: C4 (324x229mm) - fits standard A4 documents
  • Closure: Convenient self-seal adhesive flap – no licking needed
  • Paper Weight: Durable 90gsm paper
£15.86
£13.22 ex. VAT
£13.22
£15.86 inc. VAT
£15.86
£13.22 ex. VAT
£13.22
£15.86 inc. VAT

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Order now for dispatch tomorrow

Self Seal C5 Windowed Box Envelope 90gsm - White (500 Pack) WX3406

Self Seal C5 Windowed Box Envelope 90gsm White 500 Pack WX3406 369642 F
500
Pack
  • C5 Size & 500 Pack: Standard C5 envelopes, supplied in a convenient boxed pack of 500.
  • 90gsm Quality Paper: Made from substantial 90gsm paper for a reliable and professional feel.
  • Self-Seal Closure: Features a convenient self-seal closure, eliminating the need for glue or tape.
  • 90x45mm Window: Includes a clear 90 x 45mm window for easy address visibility.
£19.40
£16.17 ex. VAT
£16.17
£19.40 inc. VAT
£19.40
£16.17 ex. VAT
£16.17
£19.40 inc. VAT

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Order now for dispatch tomorrow

5 Star Office Envelopes Pocket Self Seal Window 90gsm C5 White (500 Pack) 940411

5 Star Office Envelopes Pocket Self Seal Window 90gsm C5 White 500 Pack 940411 477453 F
500
Pack
  • Size: C5 (229x162mm) - ideal for daily mailing.
  • Secure & Private: Blue opaque interior shields contents.
  • Convenient: Self-seal closure for quick use.
  • Professional Finish: 90gsm paper with clear address window.
£21.61
£18.01 ex. VAT
£18.01
£21.61 inc. VAT
£21.61
£18.01 ex. VAT
£18.01
£21.61 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Value Self Seal C4 Windowed Pocket Envelope 90gsm - White (250 Pack) 638566

5 Star Value Self Seal C4 Windowed Pocket Envelope 90gsm White 250 Pack 638566 889017 F
250
Pack
  • Size: C4 (324x229mm)
  • Pack of 250 white envelopes
  • Features a convenient window for clear addressing
  • Secure press seal closure for easy use
£22.14
£18.45 ex. VAT
£18.45
£22.14 inc. VAT
£22.14
£18.45 ex. VAT
£18.45
£22.14 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Office Peel and Seal C4 Windowed Pocket Envelope 90gsm - White (250 Pack) H90027

5 Star Office Peel and Seal C4 Windowed Pocket Envelope 90gsm White 250 Pack H90027 161334 F
250
Pack
  • Pack Size: 250 C4 (324x229mm) envelopes
  • Self-Seal & Secure: Features a self-seal closure and blue opaque interior for privacy.
  • Paper Quality: Made from 90gsm paper – lightweight but durable.
  • Professional Finish: Ideal for businesses and home offices with a window patch for addresses.
£22.14
£18.45 ex. VAT
£18.45
£22.14 inc. VAT
£22.14
£18.45 ex. VAT
£18.45
£22.14 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Value Self Seal DL Windowed Wallet Envelope 90gsm - White (1000 Pack) 1088

5 Star Value Self Seal DL Windowed Wallet Envelope 90gsm White 1000 Pack 1088 889019 F
1000
Pack
  • Pack Size: 1000 white DL-sized (110x220mm) envelopes
  • Convenient Feature: Includes a window for clear address visibility
  • Closure Type: Press seal for a secure and instant bond
  • Versatile Use: Ideal for mailings, invoices, letters, and more
£28.36
£23.63 ex. VAT
£23.63
£28.36 inc. VAT
£28.36
£23.63 ex. VAT
£23.63
£28.36 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Self Seal C6 Windowed Pocket Envelope 90gsm - White (1000 Pack) KF3410

Q Connect Self Seal C6 Windowed Pocket Envelope 90gsm White 1000 Pack KF3410 121035 F
1000
Pack
  • Suitable for A6 or folded A5 documents
  • Self-seal closure for secure mailing
  • Strong 90gsm paper for quality feel
  • Pack of 1000 white C6 envelopes
£25.85
£21.54 ex. VAT
£21.54
£25.85 inc. VAT
£25.85
£21.54 ex. VAT
£21.54
£25.85 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Self Seal C4 Windowed Pocket Envelope 90gsm - Manilla (250 Pack) 9017501

Q Connect Self Seal C4 Windowed Pocket Envelope 90gsm Manilla 250 Pack 9017501 461802 F
250
Pack
  • Size: C4 (324 x 229mm) - Ideal for A4 documents
  • Secure and Convenient: Self-seal adhesive flap for easy closure
  • Durable Quality: Crafted from 90gsm paper for reliable protection
  • Pack of 250: Manilla envelopes, perfect for business or home use
£17.91
£14.92 ex. VAT
£14.92
£17.91 inc. VAT
£17.91
£14.92 ex. VAT
£14.92
£17.91 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Evolve Recycled Self Seal DL Windowed Wallet Envelope 90gsm - White (1000 Pack) RD7884

Evolve Recycled Self Seal DL Windowed Wallet Envelope 90gsm White 1000 Pack RD7884 134717 F
1000
Pack

  • Made from 100% recycled 90gsm paper – a sustainable mailing choice.

  • DL size with a 35x90mm address window – eliminates need for labels.

  • Self-seal closure for quick, secure & professional mailing.

  • Fits A4 sheets folded twice, or A5 sheets folded once.

£52.41
£43.67 ex. VAT
£43.67
£52.41 inc. VAT
£52.41
£43.67 ex. VAT
£43.67
£52.41 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Office Self Seal DL Windowed Wallet Envelope 90gsm - White (500 Pack) 907190

5 Star Office Self Seal DL Windowed Wallet Envelope 90gsm White 500 Pack 907190 117501 F
500
Pack
  • Size: DL (220x110mm) - ideal for standard letters
  • Self-Seal: Quick and convenient closure, saving time
  • Privacy Feature: Blue opaque interior for added confidentiality
  • Pack Contains: 500 durable, 90gsm envelopes
£21.06
£17.55 ex. VAT
£17.55
£21.06 inc. VAT
£21.06
£17.55 ex. VAT
£17.55
£21.06 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

5 Star Eco Recycled Self Seal C5 Windowed Pocket Envelope 90gsm - White (500 Pack) 940406

5 Star Eco Recycled Self Seal C5 Windowed Pocket Envelope 90gsm White 500 Pack 940406 477452 F
500
Pack
  • Eco-Friendly: Made from 100% recycled 90gsm paper.
  • C5 Size: Dimensions of 229 x 162mm.
  • Self-Seal & Window: Features a convenient self-seal closure and clear window.
  • Pack of 500: Includes 500 envelopes per pack.
£31.19
£25.99 ex. VAT
£25.99
£31.19 inc. VAT
£31.19
£25.99 ex. VAT
£25.99
£31.19 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Self Seal C5 Windowed Pocket Envelope 90gsm - White (500 Pack) KF02718

Q Connect Self Seal C5 Windowed Pocket Envelope 90gsm White 500 Pack KF02718 177003 F
500
Pack
  • Pack Size: 500 envelopes (20 packs of 25)
  • Paper Weight: 90gsm white envelopes
  • Closure Type: Self-Seal for convenience
  • Suitable For: A4 (folded) or A5 documents
£43.08
£35.90 ex. VAT
£35.90
£43.08 inc. VAT
£43.08
£35.90 ex. VAT
£35.90
£43.08 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Self Seal C5 Windowed Envelope 90gsm - Manilla (500 Pack) C590500MW

Self Seal C5 Windowed Envelope 90gsm Manilla 500 Pack C590500MW 809034 F
500
Pack
  • Pack of 500: Contains a generous 500 high-quality manilla envelopes.
  • C5 Size: Specifically sized at 229x162mm to fit A5 documents.
  • Self-Seal Closure: Features a convenient self-seal adhesive flap for easy use.
  • 90gsm Paper Weight: Crafted from durable 90gsm manilla paper for reliable mailing.
£43.69
£36.41 ex. VAT
£36.41
£43.69 inc. VAT
£43.69
£36.41 ex. VAT
£36.41
£43.69 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Self Seal C4 Windowed Envelope 90gsm - White (250 Pack)

Self Seal C4 Windowed Envelope 90gsm White 250 Pack 755370 F
250
Pack
  • C4 Size & 250 Envelopes: Ideal for standard correspondence.
  • 90gsm White Paper: Provides a professional and quality feel.
  • Window & Self-Seal: For easy addressing and secure closure.
  • UK Made & Sustainable: Ethically sourced paper from renewable forests.
This item is out of stock

Self Seal C4 Windowed Envelope 90gsm - White (250 Pack)

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Window Envelopes

Find the window envelopes for your business or personal needs with our extensive range. Including various sizes, from popular DL and C5 to C4 and C6, you’ll also find sealing options like gummed, self seal and peel & seal.

Choose from a range of paper weights, including 70gsm, 80gsm, 90gsm and 120gsm options and benefit from convenient pack sizes, from economical smaller packs up to larger packs.

Ideal for invoices, letters and important documents, our window envelopes offer a professional finish. We stock both white and manilla envelopes with windows. Browse our selection to find the right size, weight and sealing method for efficient and secure mailing.

Discover our full range of envelopes, for the secure sending of correspondence at home or work.