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Up to 40% Off Selected Essentials* - Shop Top of the Picks 

40% Off PE & Sport with code  SPORT40- Terms & Conditions apply

40% Off PE & Sport with code  SPORT40 - Terms & Conditions apply

15% Off our KCS Developed & Wild Wood ranges with code NEW15. - T&C'sapply.

20% Off Art & Craft with code  ART20 - Terms & Conditions apply

20% Off Exercise Books with code  EXBOOKS  - Online only. Terms & Conditions apply

20% Off Art & Craft with code  ART20 - Terms & Conditions apply

10% Off Early Years essentials with code  IMAGINE10  - Terms & Conditions apply

10% Off Early Years essentials with code  IMAGINE10  - Terms & Conditions apply

10% Off our SEN range with code SEN10  - Terms & Conditions apply

15% Off our KCS Developed & Wildwood ranges with code NEW15. - T&C'sapply.

Start your eProcurement journey with IRIS Financials today >>

Stationery Envelopes

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  1. White Envelopes Self Seal C5 90gsm Box 500
    White Envelopes Self Seal C5 90gsm Box 500

    Product Code: 01854068

    £15.59 £12.99
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  2. White Envelopes Self Seal Window DL 90gsm Box 1000
    White Envelopes Self Seal Window DL 90gsm Box 1000

    Product Code: 01897281

    £21.59 £17.99
    Add to Favourites
  3. Manilla Envelopes Self Seal C5 90gsm Box 500
    Manilla Envelopes Self Seal C5 90gsm Box 500

    Product Code: 01854006

    £14.39 £11.99
    Add to Favourites
  4. Gusset Envelopes Peel & Seal C4 Pack 125
    Gusset Envelopes Peel & Seal C4 Pack 125

    Product Code: 01885002

    £21.59 £17.99
    Add to Favourites
  5. C4 White Envelopes Self Seal 90gsm Box of 250
    C4 White Envelopes Self Seal 90gsm Box of 250

    Product Code: 01882047

    £14.39 £11.99
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  6. Manilla Envelopes Self Seal C3 115gsm Box 125
    Manilla Envelopes Self Seal C3 115gsm Box 125

    Product Code: 01854012

    £23.99 £19.99
    Add to Favourites
  7. Manilla Envelopes Self Seal C4 90gsm Box 250
    Manilla Envelopes Self Seal C4 90gsm Box 250

    Product Code: 01800803

    £14.39 £11.99
    Add to Favourites
  8. C4 White Envelopes Peel+Seal 110gsm Box of 250
    C4 White Envelopes Peel+Seal 110gsm Box of 250

    Product Code: 01854106

    £19.19 £15.99
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  9. Mailing Envelopes C5 White Window 90gsm Bx500
    Mailing Envelopes C5 White Window 90gsm Bx500

    Product Code: 01854102

    £22.79 £18.99
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  10. Board Backed Envelopes Peel & Seal C4 Pack 125
    Board Backed Envelopes Peel & Seal C4 Pack 125

    Product Code: 01854091

    £23.99 £19.99
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  11. Manilla Envelopes Gummed C6 Box 1000
    Manilla Envelopes Gummed C6 Box 1000

    Product Code: 01850006

    £15.59 £12.99
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  12. Envelopes DL BS Peel+Seal White 110gsm Bx500
    Envelopes DL BS Peel+Seal White 110gsm Bx500

    Product Code: 01854104

    £16.79 £13.99
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  13. Envelopes C5 PS Peel+Seal White 110gsm Bx500
    Envelopes C5 PS Peel+Seal White 110gsm Bx500

    Product Code: 01854105

    £25.19 £20.99
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  14. Polypost Polythene Envelopes C3 (330 x 430mm) Pack 100
    Polypost Polythene Envelopes C3 (330 x 430mm) Pack 100

    Product Code: 01854015

    £29.99 £24.99
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  15. White Envelopes Self Seal Window C4 90gsm Box 250
    White Envelopes Self Seal Window C4 90gsm Box 250

    Product Code: 01854061

    £13.19 £10.99
    Add to Favourites
  16. Gusset Envelopes 381x254x25mm 140gsm Bx125
    Gusset Envelopes 381x254x25mm 140gsm Bx125

    Product Code: 01854107

    £34.79 £28.99
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  17. Polypost Polythene Envelopes C4+ (240 x 320mm) Pack 100
    Polypost Polythene Envelopes C4+ (240 x 320mm) Pack 100

    Product Code: 01854016

    £19.19 £15.99
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  18. Manilla Envelopes Self Seal 381 x 254mm Box 250
    Manilla Envelopes Self Seal 381 x 254mm Box 250

    Product Code: 01800809

    £23.99 £19.99
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  19. Manilla Envelopes Self Seal Window C5 80gsm Box 500
    Manilla Envelopes Self Seal Window C5 80gsm Box 500

    Product Code: 01854005

    £16.79 £13.99
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  20. Manilla Envelopes Self Seal 406 x 305mm Box 250
    Manilla Envelopes Self Seal 406 x 305mm Box 250

    Product Code: 01895009

    £29.99 £24.99
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  21. Manilla Envelopes Self Seal C4 115gsm Box 250
    Manilla Envelopes Self Seal C4 115gsm Box 250

    Product Code: 01800808

    £14.39 £11.99
    Add to Favourites
  22. White Envelopes Self Seal DL 90gsm Box 1000
    White Envelopes Self Seal DL 90gsm Box 1000

    Product Code: 01854024

    £17.99 £14.99
    Add to Favourites
  23. Bubble Bags A4 White Box 100
    Bubble Bags A4 White Box 100

    Product Code: 01234503

    £27.59 £22.99
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  24. Bubble Bags C5 White Box 100
    Bubble Bags C5 White Box 100

    Product Code: 01234502

    £22.79 £18.99
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Send school communications in style with our office envelopes. Perfect for  professional and quality letters at home or internal school communication. Combine with our office packaging and label machines for a full suite of mailing solutions.

  • Visa
  • MasterCard
  • Visa
  • MasterCard
  • Maestro
  • Cirrus
KCS Education is a trading style of CSG Global Education Ltd. Company Registration No: 01702231 (England and Wales). VAT No: GB 408 8459 25.
Registered Address: 1 Abbey Wood Road, Kings Hill, West Malling, ME19 4YT
© 2025