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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 23 products
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Cartridge People Self Seal DL Window Envelope 80gsm White (500 Pack)

Cartridge People Self Seal DL Window Envelope 80gsm White 500 Pack 47118 CP
500
Pack
  • Suitable for A4 folded twice in zigzag
  • Secure self-seal fastening
  • White, 80gsm paper
  • Pack of 500
£17.99
£14.99 ex. VAT
£14.99
£17.99 inc. VAT
£17.99
£14.99 ex. VAT
£14.99
£17.99 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Cartridge People Self Seal C5 Window Envelope 80gsm White 500 Pack 47121 CP
500
Pack
  • Suitable for A5 paper and A4 folded in half
  • Secure self-seal fastening
  • White, 80gsm paper
  • Pack of 500
£17.99
£14.99 ex. VAT
£14.99
£17.99 inc. VAT
£17.99
£14.99 ex. VAT
£14.99
£17.99 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Cartridge People Self Seal C4 Window Envelope 120gsm White 250 Pack 47124 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 tomorrow

Order now for dispatch tomorrow

Blake Purely Everyday Self Seal DL Windowed Envelope 90gsm White (50 Pack)

Blake Purely Everyday Self Seal DL Windowed Envelope 90gsm White 50 Pack 454193 F
50
Pack
  • Pack Size: 50 envelopes
  • Paperweight: 90gsm for quality feel
  • Size: DL – standard letter size
  • Closure: Self-seal for convenience
£4.78
£3.98 ex. VAT
£3.98
£4.78 inc. VAT
£4.78
£3.98 ex. VAT
£3.98
£4.78 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Q Connect Self Seal DL Windowed Envelope 100gsm White 1000 Pack 109384 F
1000
Pack
  • Pack Size: 1000 white envelopes
  • Paper Weight: Crafted from 100gsm paper for a professional finish
  • Size: DL – fits A4/A5 sheets
  • Closure: Convenient self-seal for secure mailing
£30.22
£25.18 ex. VAT
£25.18
£30.22 inc. VAT
£30.22
£25.18 ex. VAT
£25.18
£30.22 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Q Connect Self Seal C5 Windowed Pocket Envelope 100gsm White 500 Pack 461804 F
500
Pack
  • Size: C5 (229 x 162mm) - Ideal for A5 & folded A4 documents.
  • Self-Seal Closure: Eliminates the need for moistening.
  • Clear Window: Allows easy content identification.
  • Pack of 500: Perfect for business or home use.
£25.78
£21.48 ex. VAT
£21.48
£25.78 inc. VAT
£25.78
£21.48 ex. VAT
£21.48
£25.78 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Q Connect Self Seal C4 Windowed Basketweave Pocket Envelope 115gsm Manilla 250 Pack 137017 F
250
Pack
  • Pack of 250: Ideal for frequent mailing needs
  • C4 Size and 115gsm Paper: Suitable for A4 documents with a professional finish
  • Self-Seal Closure: Quick, secure, and eliminates the need for licking
  • Clear Window (40x105mm): Enhances address visibility for streamlined mailing
£23.62
£19.68 ex. VAT
£19.68
£23.62 inc. VAT
£23.62
£19.68 ex. VAT
£19.68
£23.62 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Q Connect Self Seal C4 Windowed Pocket Envelope 90gsm Manilla 250 Pack 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

Plus Fabric Self Seal C5 Windowed Envelope 120gsm White (500 Pack)

Plus Fabric Self Seal C5 Windowed Envelope 120gsm White 500 Pack 103524 F
500
Pack
  • Pack of 500: Contains 500 white C5 envelopes.
  • Durable Paper: Made from 120gsm paper for document protection.
  • Self-Seal Closure: Features a convenient, no-lick self-seal.
  • C5 Size with Window: Fits A5 or folded A4 documents; includes a 100x40mm address window.
£79.23
£66.02 ex. VAT
£66.02
£79.23 inc. VAT
£79.23
£66.02 ex. VAT
£66.02
£79.23 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

5 Star Value Self Seal C5 Windowed Pocket Envelope 100gsm White 500 Pack 889030 F
500
Pack
  • Pack Size: 500 envelopes
  • Size: C5 (229 x 162mm)
  • Paper Weight: 100gsm
  • Closure Type: Press Seal
£23.58
£19.65 ex. VAT
£19.65
£23.58 inc. VAT
£23.58
£19.65 ex. VAT
£19.65
£23.58 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Q Connect Recycled Self Seal DL Windowed Envelope 100gsm White 500 Pack 133660 F
500
Pack
  • Eco-Friendly: Made from 100% recycled 100gsm paper.
  • Convenient: Self-seal closure for easy use.
  • Size & Format: DL size, fits A4/A5 folded documents.
  • Pack Size: Contains 500 envelopes.
£22.18
£18.48 ex. VAT
£18.48
£22.18 inc. VAT
£22.18
£18.48 ex. VAT
£18.48
£22.18 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Q Connect Self Seal C6 Windowed Pocket Envelope 90gsm White 1000 Pack 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

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

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

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

Evolve Recycled Self Seal C4 Windowed Pocket Envelope 100gsm White 250 Pack 157122 F
250
Pack
  • Eco-Friendly: Made from 100% recycled 100gsm paper.
  • Size & Format: C4 envelopes designed for A4 documents.
  • Convenient Closure: Features a self-seal closure – no licking needed.
  • Pack Size: Includes 250 envelopes per pack.
£37.58
£31.32 ex. VAT
£31.32
£37.58 inc. VAT
£37.58
£31.32 ex. VAT
£31.32
£37.58 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Evolve Recycled Self Seal C5 Windowed Envelope 100gsm White (500 Pack)

Evolve Recycled Self Seal C5 Windowed Envelope 100gsm White 500 Pack 221800 F
500
Pack
  • Eco-Friendly: Made from 100% recycled 100gsm paper.
  • Convenient: Features a self-seal closure and 45x90mm window.
  • Size: C5 envelopes, ideal for A4/A5 documents.
  • Quantity: Pack of 500 envelopes.
£43.21
£36.01 ex. VAT
£36.01
£43.21 inc. VAT
£43.21
£36.01 ex. VAT
£36.01
£43.21 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Plus Fabric Self Seal C4 Windowed Pocket Envelope 120gsm White (250 Pack)

Plus Fabric Self Seal C4 Windowed Pocket Envelope 120gsm White 250 Pack 127526 F
250
Pack
  • Size: C4, ideal for A4 documents
  • Material: Durable 120gsm paper construction
  • Closure: Convenient self-seal design
  • Pack: Includes 250 white envelopes
£147.43
£122.86 ex. VAT
£122.86
£147.43 inc. VAT
£147.43
£122.86 ex. VAT
£122.86
£147.43 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)

5 Star Eco Recycled Self Seal C5 Windowed Pocket Envelope 90gsm White 500 Pack 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

Plus Fabric Self Seal DL Windowed Wallet Envelope 120gsm White (500 Pack)

Plus Fabric Self Seal DL Windowed Wallet Envelope 120gsm White 500 Pack 127190 F
500
Pack
  • Pack of 500: Contains 500 white DL envelopes.
  • 120gsm Paper: Crafted from robust 120gsm paper for reliable mailing.
  • Self-Seal Closure: Features a convenient self-seal closure for secure contents.
  • Fits A5/A4: Comfortably fits A5 sheets folded once, or A4 sheets folded twice.
£57.48
£47.90 ex. VAT
£47.90
£57.48 inc. VAT
£57.48
£47.90 ex. VAT
£47.90
£57.48 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

New Guardian Self Seal C4 Windowed Envelope 130gsm Manilla (250 Pack)

New Guardian Self Seal C4 Windowed Envelope 130gsm Manilla 250 Pack 125027 F
250
Pack
  • Pack Size: 250 manilla envelopes
  • Paper Weight: Durable 130gsm paper
  • Envelope Size: C4, fits unfolded A4 documents
  • Closure Type: Self-seal with 40x100mm address window
£57.89
£48.24 ex. VAT
£48.24
£57.89 inc. VAT
£57.89
£48.24 ex. VAT
£48.24
£57.89 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Plus Fabric Self Seal C6 Windowed Wallet Envelope 120gsm White (500 Pack)

Plus Fabric Self Seal C6 Windowed Wallet Envelope 120gsm White 500 Pack 117423 F
500
Pack
  • Secure Mailing: Self-seal closure and opaque blue interior for confidential documents.
  • Durable Quality: Crafted from 120gsm paper for reliable handling.
  • Convenient Features: Includes a 39 x 93mm address window for easy addressing.
  • Bulk Pack: Contains 500 C6 sized envelopes for ample supply.
£109.39
£91.16 ex. VAT
£91.16
£109.39 inc. VAT
£109.39
£91.16 ex. VAT
£91.16
£109.39 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Self Seal C4 Windowed Envelope 90gsm Manilla 250 Pack 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

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Self Seal DL Windowed Envelope 80gsm Manilla (1000 Pack)

Self Seal DL Windowed Envelope 80gsm Manilla 1000 Pack 809036 F
1000
Pack
  • Quantity: 1000 high-quality manilla envelopes per pack.
  • Size & Fit: DL size (110x220mm) – fits tri-folded A4 documents.
  • Closure Type: Features a convenient self-seal adhesive flap.
  • Paper Quality: Made from durable 80gsm paper.
£22.51
£18.76 ex. VAT
£18.76
£22.51 inc. VAT
£22.51
£18.76 ex. VAT
£18.76
£22.51 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

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

Self Seal C5 Windowed Envelope 90gsm Manilla 500 Pack 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

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.