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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 73 products
1 - 36 of 73 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

5 Star Office Peel and Seal DL Windowed Wallet Envelope 100gsm - White (500 Pack) 906608

5 Star Office Peel and Seal DL Windowed Wallet Envelope 100gsm White 500 Pack 906608 129739 F
500
Pack
  • Size: DL (220x110mm)
  • Convenient peel and seal closure
  • Pack of 500 durable, 100gsm envelopes
  • Blue opaque interior for added privacy
£17.49
£14.57 ex. VAT
£14.57
£17.49 inc. VAT
£17.49
£14.57 ex. VAT
£14.57
£17.49 inc. VAT

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Order now for dispatch tomorrow

5 Star Office Self Seal DL Windowed Wallet Envelope 80gsm - White (1000 Pack) M90025

5 Star Office Self Seal DL Windowed Wallet Envelope 80gsm White 1000 Pack M90025 128002 F
1000
Pack
  • Size: DL (220x110mm) - Ideal for standard business correspondence
  • Quantity: 1000 envelopes per pack - Provides a large supply for frequent use
  • Self-Seal and Window Patch - Offers convenience and clear address visibility
  • 80gsm Paper with Security Interior - Durable paper with added privacy
£23.75
£19.79 ex. VAT
£19.79
£23.75 inc. VAT
£23.75
£19.79 ex. VAT
£19.79
£23.75 inc. VAT

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Order now for dispatch tomorrow

Blake Purely Everyday Peel and Seal DL Windowed Envelope 100gsm - White (50 Pack) 23884/50PR

Blake Purely Everyday Peel and Seal DL Windowed Envelope 100gsm White 50 Pack 23884 50PR 434292 F
50
Pack
  • Size: Dl
  • Quantity: 50 Envelopes per Pack
  • Closure: Convenient Peel & Seal
  • Features: Includes a window for clear address visibility
£3.84
£3.20 ex. VAT
£3.20
£3.84 inc. VAT
£3.84
£3.20 ex. VAT
£3.20
£3.84 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

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Order now for dispatch tomorrow

Self Seal DL Windowed Envelope 80gsm - White (1000 Pack) WX3455

Self Seal DL Windowed Envelope 80gsm White 1000 Pack WX3455 226422 F
1000
Pack
  • Bulk pack of 1000 white DL window envelopes.
  • Suitable for A5 or folded A4 documents.
  • Features a convenient self-seal flap.
  • Made from quality 80gsm paper for a professional finish.
£22.40
£18.67 ex. VAT
£18.67
£22.40 inc. VAT
£22.40
£18.67 ex. VAT
£18.67
£22.40 inc. VAT

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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 DL Windowed Envelope 80gsm - White (250 Pack) KF07557

Q Connect Self Seal DL Windowed Envelope 80gsm White 250 Pack KF07557 610339 F
250
Pack
  • Q-Connect DL Window Envelopes - 250 pack for office or home use.
  • Clear window for easy address visibility.
  • Self-seal closure - no licking needed!
  • Suitable for A4 (folded twice) & A5 (folded once) sheets.
£8.76
£7.30 ex. VAT
£7.30
£8.76 inc. VAT
£8.76
£7.30 ex. VAT
£7.30
£8.76 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 DL Windowed Envelope 80gsm - White (1000 Pack) KF3455

Q Connect Self Seal DL Windowed Envelope 80gsm White 1000 Pack KF3455 110645 F
1000
Pack
  • 1000-pack of white DL window envelopes
  • Self-seal closure for secure mailing
  • 35 x 89mm address window for easy addressing
  • Suitable for A4 & A5 sheet sizes
£24.59
£20.49 ex. VAT
£20.49
£24.59 inc. VAT
£24.59
£20.49 ex. VAT
£20.49
£24.59 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

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Order now for dispatch tomorrow

Q-Connect Peel and Seal C4 Windowed Envelope 120gsm 25mm Gusset - White (125 Pack) KF02891

Q Connect Peel and Seal C4 Windowed Envelope 120gsm 25mm Gusset White 125 Pack KF02891 181459 F
125
Pack
  • Suitable for A4 documents
  • 120gsm heavyweight paper for durability
  • 25mm expanding gusset accommodates bulky mail
  • Secure peel and seal closure
£33.96
£28.30 ex. VAT
£28.30
£33.96 inc. VAT
£33.96
£28.30 ex. VAT
£28.30
£33.96 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Self Seal C5 Windowed Pocket Envelope 100gsm - White (500 Pack) 9007500

Q Connect Self Seal C5 Windowed Pocket Envelope 100gsm White 500 Pack 9007500 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.
£21.09
£17.57 ex. VAT
£17.57
£21.09 inc. VAT
£21.09
£17.57 ex. VAT
£17.57
£21.09 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

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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

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Peel and Seal C5 Windowed Pocket Envelope 100gsm - White (500 Pack) KF03290

Q Connect Peel and Seal C5 Windowed Pocket Envelope 100gsm White 500 Pack KF03290 280223 F
500
Pack
  • Pack of 500: Ideal for bulk mailing needs
  • C5 Size with Window: Fits A4/A5 documents and features a 45x90mm window
  • 100gsm Paper: Offers a professional and quality feel
  • Peel and Seal Closure: Ensures secure and tidy mailing
£21.45
£17.87 ex. VAT
£17.87
£21.45 inc. VAT
£21.45
£17.87 ex. VAT
£17.87
£21.45 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

5 Star Value Self Seal DL Windowed Wallet Envelope 80gsm - White (1000 Pack) 638515

5 Star Value Self Seal DL Windowed Wallet Envelope 80gsm White 1000 Pack 638515 889014 F
1000
Pack
  • Size: DL (110x220mm) - Perfect for standard letters
  • Press Seal Closure: No licking needed for a secure, instant seal
  • Paper Weight: 80gsm lightweight paper for reliable mailing
  • Pack of 1000: Generous quantity for business or home use
£25.25
£21.04 ex. VAT
£21.04
£25.25 inc. VAT
£25.25
£21.04 ex. VAT
£21.04
£25.25 inc. VAT

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Order now for dispatch tomorrow

5 Star Office Peel and Seal C4 Windowed Envelope 120gsm 25mm Gusset - White (125 Pack) 930183

5 Star Office Peel and Seal C4 Windowed Envelope 120gsm 25mm Gusset White 125 Pack 930183 284129 F
125
Pack
  • Professional Quality: Crafted from 120gsm paper for a polished finish.
  • Secure & Convenient: Features a peel and seal closure – no moisture needed.
  • Accommodates Bulkier Items: 25mm V-base gusset expands for catalogues, certificates & reports.
  • C4 Size & Pack of 125: Dimensions 324x229x25mm, with a pack containing 125 envelopes.
£28.07
£23.39 ex. VAT
£23.39
£28.07 inc. VAT
£28.07
£23.39 ex. VAT
£23.39
£28.07 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

5 Star Office Peel and Seal C5 Windowed Pocket Envelope 80gsm - White (25 Pack) FS600407

5 Star Office Peel and Seal C5 Windowed Pocket Envelope 80gsm White 25 Pack FS600407 912085 F
25
Pack
  • Pack Size: 25 high-quality white envelopes
  • Closure Type: Convenient peel and seal – no licking needed!
  • Window Size: 45 x 90mm for clear address visibility
  • Paper Size Compatibility: Fits A4 (folded) or A5 (unfolded) sheets
£2.47
£2.06 ex. VAT
£2.06
£2.47 inc. VAT
(1)
£2.47
£2.06 ex. VAT
£2.06
£2.47 inc. VAT
(1)

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Order now for dispatch tomorrow

Plus Fabric Self Seal C5 Windowed Envelope 120gsm - White (500 Pack) C26870

Plus Fabric Self Seal C5 Windowed Envelope 120gsm White 500 Pack C26870 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

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Order now for dispatch tomorrow

Self Seal DL Windowed Envelope 80gsm - White (1000 Pack)

Self Seal DL Windowed Envelope 80gsm White 1000 Pack 755366 F
1000
Pack
  • 1000 Self-Seal Envelopes: Perfect for both business and personal use.
  • Convenient Window: Eliminates the need for addressing labels.
  • 80gsm Paper: Offers a quality feel and reliable performance.
  • UK Manufactured & Sustainable: Ethically sourced paper from renewable forests.
£22.39
£18.66 ex. VAT
£18.66
£22.39 inc. VAT
£22.39
£18.66 ex. VAT
£18.66
£22.39 inc. VAT

Order now for dispatch tomorrow

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

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Peel and Seal C4 Windowed Envelope 100gsm - White (250 Pack) KF03292

Q Connect Peel and Seal C4 Windowed Envelope 100gsm White 250 Pack KF03292 280221 F
250
Pack
  • Size: C4 (324 x 229mm) - Fits standard A4 documents.
  • Paper Weight: 100gsm - Offers a professional finish.
  • Closure: Peel and Seal - Ensures a secure closure.
  • Pack Quantity: 250 - Ideal for everyday mailing needs.
£21.15
£17.62 ex. VAT
£17.62
£21.15 inc. VAT
£21.15
£17.62 ex. VAT
£17.62
£21.15 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Self Seal C4 Windowed Envelope 100gsm - White (250 Pack) KF3535

Q Connect Self Seal C4 Windowed Envelope 100gsm White 250 Pack KF3535 113355 F
250
Pack
  • Size: C4
  • Paper Weight: 100gsm
  • Features: Clear address window (40 x 105mm)
  • Closure: Self-seal adhesive flap
£22.18
£18.48 ex. VAT
£18.48
£22.18 inc. VAT
£22.18
£18.48 ex. VAT
£18.48
£22.18 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

Q-Connect Peel and Seal DL Windowed Wallet Envelope 100gsm - White (500 Pack) KF03000

Q Connect Peel and Seal DL Windowed Wallet Envelope 100gsm White 500 Pack KF03000 280225 F
500
Pack
  • Pack Size: 500 envelopes
  • Paper Weight: 100gsm for quality feel
  • Closure Type: Convenient peel and seal
  • Size: DL – ideal for A4/A5 sheets
£19.35
£16.12 ex. VAT
£16.12
£19.35 inc. VAT
£19.35
£16.12 ex. VAT
£16.12
£19.35 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

Plus Fabric Peel and Seal C4 Windowed Envelope 120gsm 25mm Gusset - White (100 Pack) C27566

Plus Fabric Peel and Seal C4 Windowed Envelope 120gsm 25mm Gusset White 100 Pack C27566 139221 F
100
Pack
  • Suitable for A4 documents with a 25mm expanding gusset.
  • Made from durable 120gsm bright white paper.
  • Features a convenient 45 x 100mm address window.
  • Pack of 100 C4 envelopes with a peel and seal closure.
£85.29
£71.07 ex. VAT
£71.07
£85.29 inc. VAT
£85.29
£71.07 ex. VAT
£71.07
£85.29 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.