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Gusset Envelopes

Mail your bulky documents securely with our Gusset Envelopes. Designed to expand for larger items, they are perfect for sending catalogs, brochures, or multiple documents.

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  • Best Value Blake Purely Packaging 406 x 305 x 30 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (33301) Manilla - Pack of 125
    Best Value Blake Purely Packaging 406 x 305 x 30 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (33301) Manilla - Pack of 125
    Sold out

    Blake Purely Packaging 406 x 305 x 30 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (33301) Manilla - Pack of 125

    £49.99 GBP - £49.99 GBP
    £49.99 GBP
    £49.99 GBP - £49.99 GBP
    £49.99 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality 140gsm paper Perfect for catalogues, ...

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  • Best Value Blake Premium Avant Garde 406 x 305 x 30 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0070) Cream Manilla - Pack of 100
    Best Value Blake Premium Avant Garde 406 x 305 x 30 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0070) Cream Manilla - Pack of 100
    Sold out

    Blake Premium Avant Garde 406 x 305 x 30 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0070) Cream Manilla - Pack of 100

    £98.49 GBP - £98.49 GBP
    £98.49 GBP
    £98.49 GBP - £98.49 GBP
    £98.49 GBP
    Out of stock

    Make a difference to your mail with these high quality Premium Avant Garde envelopes by Blake Power-seal peel & seal for extended shelf life...

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  • Best Value Blake Premium Avant Garde 381 x 254 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0062) Cream Manilla - Pack of 100
    Best Value Blake Premium Avant Garde 381 x 254 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0062) Cream Manilla - Pack of 100
    Sold out

    Blake Premium Avant Garde 381 x 254 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0062) Cream Manilla - Pack of 100

    £84.49 GBP - £84.49 GBP
    £84.49 GBP
    £84.49 GBP - £84.49 GBP
    £84.49 GBP
    Out of stock

    Make a difference to your mail with these high quality Premium Avant Garde envelopes by Blake Power-seal peel & seal for extended shelf life...

    View full details
  • Best Value Blake Premium Secure C4 324 x 229 x 25 mm 125 gsm Tear Resistant Gusset Pocket Peel & Seal Window Envelopes (TR9901) White - Pack of 100
    Best Value Blake Premium Secure C4 324 x 229 x 25 mm 125 gsm Tear Resistant Gusset Pocket Peel & Seal Window Envelopes (TR9901) White - Pack of 100
    Sold out

    Blake Premium Secure C4 324 x 229 x 25 mm 125 gsm Tear Resistant Gusset Pocket Peel & Seal Window Envelopes (TR9901) White - Pack of 100

    £125.99 GBP - £125.99 GBP
    £125.99 GBP
    £125.99 GBP - £125.99 GBP
    £125.99 GBP
    Out of stock

    Make a difference to your mail with these durable Premium Secure envelopes by Blake Made from high quality 125gsm, tear resistant paper Secure...

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  • Best Value Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Window Envelopes (6001) White - Pack of 125
    Best Value Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Window Envelopes (6001) White - Pack of 125
    Sold out

    Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Window Envelopes (6001) White - Pack of 125

    £26.99 GBP - £26.99 GBP
    £26.99 GBP
    £26.99 GBP - £26.99 GBP
    £26.99 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality 120gsm paper Perfect for catalogues, ...

    View full details
  • Best Value Blake Premium Office C4 324 x 229 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (37115) Ultra White Wove - Pack of 100
    Best Value Blake Premium Office C4 324 x 229 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (37115) Ultra White Wove - Pack of 100
    Sold out

    Blake Premium Office C4 324 x 229 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (37115) Ultra White Wove - Pack of 100

    £63.18 GBP
    £63.18 GBP - £63.18 GBP
    £63.18 GBP
    £46.99 GBP
    £46.99 GBP - £46.99 GBP
    £46.99 GBP
    Out of stock

    Make a difference to your mail with these quality Premium Office envelopes by Blake Quality 120 gsm FSC Certified Paper Attractive box for saf...

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  • Best Value Blake Premium Avant Garde C4 324 x 229 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Window Pocket Envelopes (AG0054) Cream Manilla - Pack of 100
    Best Value Blake Premium Avant Garde C4 324 x 229 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Window Pocket Envelopes (AG0054) Cream Manilla - Pack of 100
    Sold out

    Blake Premium Avant Garde C4 324 x 229 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Window Pocket Envelopes (AG0054) Cream Manilla - Pack of 100

    £76.99 GBP - £76.99 GBP
    £76.99 GBP
    £76.99 GBP - £76.99 GBP
    £76.99 GBP
    Out of stock

    Make a difference to your mail with these high quality Premium Avant Garde envelopes by Blake Power-seal peel & seal for extended shelf life...

    View full details
  • Best Value Blake Purely Packaging C4 324 x 229 x 25 mm 130 gsm Gusset Pocket Peel & Seal Window Envelopes (1992MW) Manilla - Pack of 125
    Best Value Blake Purely Packaging C4 324 x 229 x 25 mm 130 gsm Gusset Pocket Peel & Seal Window Envelopes (1992MW) Manilla - Pack of 125
    Sold out

    Blake Purely Packaging C4 324 x 229 x 25 mm 130 gsm Gusset Pocket Peel & Seal Window Envelopes (1992MW) Manilla - Pack of 125

    £35.99 GBP - £35.99 GBP
    £35.99 GBP
    £35.99 GBP - £35.99 GBP
    £35.99 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality 130gsm paper Perfect for catalogues, ...

    View full details
  • Best Value Blake Purely Packaging 381 x 254 x 25 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (11101) Manilla - Pack of 125
    Best Value Blake Purely Packaging 381 x 254 x 25 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (11101) Manilla - Pack of 125
    Sold out

    Blake Purely Packaging 381 x 254 x 25 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (11101) Manilla - Pack of 125

    £34.49 GBP - £34.49 GBP
    £34.49 GBP
    £34.49 GBP - £34.49 GBP
    £34.49 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality 140gsm paper Perfect for catalogues, ...

    View full details
  • Best Value Blake Premium Avant Garde C4 324 x 229 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0052) Cream Manilla - Pack of 100
    Best Value Blake Premium Avant Garde C4 324 x 229 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0052) Cream Manilla - Pack of 100
    Sold out

    Blake Premium Avant Garde C4 324 x 229 x 25 mm 140 gsm Heavyweight Extra Strong Peel & Seal Gusset Pocket Envelopes (AG0052) Cream Manilla - Pack of 100

    £74.49 GBP - £74.49 GBP
    £74.49 GBP
    £74.49 GBP - £74.49 GBP
    £74.49 GBP
    Out of stock

    Make a difference to your mail with these high quality Premium Avant Garde envelopes by Blake Power-seal peel & seal for extended shelf life...

    View full details
  • Best Value Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (5000) Manilla - Pack of 125
    Best Value Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (5000) Manilla - Pack of 125
    Sold out

    Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (5000) Manilla - Pack of 125

    £25.49 GBP - £25.49 GBP
    £25.49 GBP
    £25.49 GBP - £25.49 GBP
    £25.49 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality 120gsm paper Perfect for catalogues, ...

    View full details
  • Best Value Blake Purely Packaging C4 324 x 229 x 25 mm 130 gsm Gusset Pocket Peel & Seal Envelopes (1991) Manilla - Pack of 125
    Best Value Blake Purely Packaging C4 324 x 229 x 25 mm 130 gsm Gusset Pocket Peel & Seal Envelopes (1991) Manilla - Pack of 125
    Sold out

    Blake Purely Packaging C4 324 x 229 x 25 mm 130 gsm Gusset Pocket Peel & Seal Envelopes (1991) Manilla - Pack of 125

    £26.49 GBP - £26.49 GBP
    £26.49 GBP
    £26.49 GBP - £26.49 GBP
    £26.49 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality 130gsm paper Perfect for catalogues, ...

    View full details
  • Best Value Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (6000) White - Pack of 125
    Best Value Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (6000) White - Pack of 125
    Sold out

    Blake Purely Packaging C5 229 x 162 x 25 mm 120 gsm Gusset Pocket Peel & Seal Envelopes (6000) White - Pack of 125

    £23.99 GBP - £23.99 GBP
    £23.99 GBP
    £23.99 GBP - £23.99 GBP
    £23.99 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality 120gsm paper Perfect for catalogues, ...

    View full details
  • Best Value Blake Purely Packaging C4 324 x 229 x 25 mm 140 gsm Gusset Pocket Peel & Seal Window Envelopes (9001) White - Pack of 125
    Best Value Blake Purely Packaging C4 324 x 229 x 25 mm 140 gsm Gusset Pocket Peel & Seal Window Envelopes (9001) White - Pack of 125
    Sold out

    Blake Purely Packaging C4 324 x 229 x 25 mm 140 gsm Gusset Pocket Peel & Seal Window Envelopes (9001) White - Pack of 125

    £32.37 GBP - £32.37 GBP
    £32.37 GBP
    £33.99 GBP
    £33.99 GBP - £33.99 GBP
    £33.99 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality paper Perfect for catalogues, books, ...

    View full details
  • Best Value Blake Purely Packaging C4 324 x 229 x 25 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (9000) White - Pack of 125
    Best Value Blake Purely Packaging C4 324 x 229 x 25 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (9000) White - Pack of 125
    Sold out

    Blake Purely Packaging C4 324 x 229 x 25 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (9000) White - Pack of 125

    £31.58 GBP
    £31.58 GBP - £31.58 GBP
    £31.58 GBP
    £21.99 GBP
    £21.99 GBP - £21.99 GBP
    £21.99 GBP
    Out of stock

    Secure Peel and Seal Closure for ease of use, added security and extra shelf life Made from high quality 140gsm paper Perfect for catalogues, ...

    View full details

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