Skip to Content Skip to Navigation
Promo Image
Hop into Easter magic! FREE Guylian Temptations Mix Easter Egg
Product Image
Call us: 0330 128 1399

Call support

Available Weekdays 8am to 6pm

* Please note: Landline calls will be charged at local rate. Calls from mobiles may vary. Please check with your provider for details of exact call charges.

Customer service

Customer service

Our customer support is available every working day between 8am and 6pm.

Prices excl. VAT

Prices incl. / excl. VAT

You can choose to show the prices inclusive or exclusive of VAT on our website

Place an order today to unlock your cashback from our partner! (per their T&Cs)
  1. Home
  2. Paper, Envelopes & Packaging
  3. Packing & Mailing
  4. Envelopes & Mailing Bags
  5. Expanding & Gusset Envelopes
Chat

Expanding & Gusset Envelopes - C4

(21)
Applied filters
  1. Viking C4 Gusset Envelopes 229 x 324mm Peel and Seal Plain 120 gsm Brown Pack of 125
    Own Own Brand Brand
    Sustainable
    Own Own Brand Brand
    Sustainable
    Viking C4 Gusset Envelopes 229 x 324mm Peel and Seal Plain 120 gsm Brown Pack of 125 Viking No. 2091794
    4.5 out of 5 stars
    (9)
    Only
    £14.99
    Pack
    £17.99 incl. VAT
    Currently in stock Order before 6:00 PM for next working day delivery.
  2. Purely Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 130 gsm Manilla Pack of 125
    Purely Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 130 gsm Manilla Pack of 125 Viking No. 1173889
    Only
    £29.99
    Pack
    £35.99 incl. VAT
    Currently in stock Order before 6:00 PM for next working day delivery.
  3. Purely Packaging Vita Gusset Envelopes C4 Peel & Seal 140 gsm White Pack of 125
    Purely Packaging Vita Gusset Envelopes C4 Peel & Seal 140 gsm White Pack of 125 Viking No. 1173890
    Only
    £37.99
    Pack
    £45.59 incl. VAT
    Currently in stock Order before 6:00 PM for next working day delivery.
  4. Tyvek C4 Pocket Envelopes 229 x 324 mm Peel and Seal Plain 54 gsm White Pack of 100
    Tyvek C4 Pocket Envelopes 229 x 324 mm Peel and Seal Plain 54 gsm White Pack of 100 Viking No. ND538209
    Buy More, Save More
    £53.99
    Pack
    from 3 Packs
    £64.79 incl. VAT
    QTY excl. VAT incl. VAT
    1-2 £59.99 £71.99
    3+ £53.99 £64.79
    Currently in stock Order before 6:00 PM for next working day delivery.
  5. Blake C4 Envelopes 229 x 324mm Peel and Seal Plain 130 gsm Cream Manilla Pack of 250
    Sustainable
    Sustainable
    Blake C4 Envelopes 229 x 324mm Peel and Seal Plain 130 gsm Cream Manilla Pack of 250 Viking No. 6298596
    5 out of 5 stars
    (2)
    Buy More, Save More
    £49.99
    Pack
    from 3 Packs
    £59.99 incl. VAT
    QTY excl. VAT incl. VAT
    1-2 £52.99 £63.59
    3+ £49.99 £59.99
    Currently in stock Order before 6:00 PM for next working day delivery.
  6. Tyvek C4 Gusset Envelopes 229 x 324 mm Peel and Seal Plain 55 gsm White Pack of 100
    Tyvek C4 Gusset Envelopes 229 x 324 mm Peel and Seal Plain 55 gsm White Pack of 100 Viking No. ND538212
    4 out of 5 stars
    (1)
    Buy More, Save More
    £83.49
    Pack
    from 3 Packs
    £100.19 incl. VAT
    QTY excl. VAT incl. VAT
    1-2 £92.49 £110.99
    3+ £83.49 £100.19
    Currently in stock Order before 6:00 PM for next working day delivery.
  7. Purely Nature First Ennvironmental C4 Gusset Envelopes Peel & Seal 324 x 229 x 25 mm Plain 140 gsm White Pack of 125
    Sustainable
    Sustainable
    Purely Nature First Ennvironmental C4 Gusset Envelopes Peel & Seal 324 x 229 x 25 mm Plain 140 gsm White Pack of 125 Viking No. 1153319
    Only
    £64.99
    Pack
    £77.99 incl. VAT
    Currently in stock Order before midnight for delivery in 5-8 working days
    Shipped directly from supplier
    Min. qty 2
  8. Purely Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 130 gsm Manilla 1992MW Pack of 125
    Purely Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 130 gsm Manilla 1992MW Pack of 125 Viking No. 1153213
    Only
    £39.99
    Pack
    £47.99 incl. VAT
    Currently in stock Order before 6:00 PM for next working day delivery.
  9. Blake Cream Manilla Gusset Envelope Peel and Seal C4 229x324x25mm 140 gsm Pack of 100
    Sustainable
    Sustainable
    Blake Cream Manilla Gusset Envelope Peel and Seal C4 229x324x25mm 140 gsm Pack of 100 Viking No. 6298713
    5 out of 5 stars
    (2)
    Buy More, Save More
    £49.99
    Pack
    from 3 Packs
    £59.99 incl. VAT
    QTY excl. VAT incl. VAT
    1-2 £52.99 £63.59
    3+ £49.99 £59.99
    Currently in stock Order before 6:00 PM for next working day delivery.
  10. PREMIUM Tear Resistant Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 125 gsm White Pack of 100
    PREMIUM Tear Resistant Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 125 gsm White Pack of 100 Viking No. 1162182
    Only
    £109.00
    Pack
    £130.80 incl. VAT
    Currently in stock Order before 6:00 PM for next working day delivery.
  11. PREMIUM Office Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 140 gsm Ultra White Wove Pack of 100
    Sustainable
    Sustainable
    PREMIUM Office Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 140 gsm Ultra White Wove Pack of 100 Viking No. 1153386
    Only
    £81.49
    Pack
    £97.79 incl. VAT
    Currently in stock Order before midnight for delivery in 5-8 working days
    Shipped directly from supplier
    Min. qty 2
  12. Purely Nature First Ennvironmental C4 Gusset Envelopes Peel & Seal 324 x 229 x 25 mm Plain RN091 140 gsm White Pack of 125
    Sustainable
    Sustainable
    Purely Nature First Ennvironmental C4 Gusset Envelopes Peel & Seal 324 x 229 x 25 mm Plain RN091 140 gsm White Pack of 125 Viking No. 1153321
    Only
    £66.49
    Pack
    £79.79 incl. VAT
    Currently in stock Order before midnight for delivery in 5-8 working days
    Shipped directly from supplier
    Min. qty 2
  13. Creative Mid Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 120 gsm Storm Grey Pack of 125
    Creative Mid Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 120 gsm Storm Grey Pack of 125 Viking No. 1173978
    Only
    £107.00
    Pack
    £128.40 incl. VAT
    Currently in stock Order before midnight for delivery in 5-8 working days
    Shipped directly from supplier
  14. Blake Cream Manilla Gusset Window Envelope Peel and Seal C4 229x324x25mm 140 gsm Pack of 100
    Sustainable
    Sustainable
    Blake Cream Manilla Gusset Window Envelope Peel and Seal C4 229x324x25mm 140 gsm Pack of 100 Viking No. 6298722
    Buy More, Save More
    £59.99
    Pack
    from 3 Packs
    £71.99 incl. VAT
    QTY excl. VAT incl. VAT
    1-2 £62.99 £75.59
    3+ £59.99 £71.99
    Temporarily out of stock Order now and we will deliver when available (approx. 6-7 working days)
  15. PREMIUM Tear Resistant Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 125 gsm White Pack of 20
    PREMIUM Tear Resistant Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 125 gsm White Pack of 20 Viking No. 1162183
    Only
    £41.49
    Pack
    £49.79 incl. VAT
    Temporarily sold out

    Do you want to receive a one-off e-mail when this item is back in stock?

  16. Creative Bright Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 140 gsm Pillar Box Red Pack of 125
    Creative Bright Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 140 gsm Pillar Box Red Pack of 125 Viking No. 1174084
    Only
    £117.00
    Pack
    £140.40 incl. VAT
    Temporarily sold out

    Do you want to receive a one-off e-mail when this item is back in stock?

  17. Purely EcoCushion Gusset Envelopes C4 Peel & Seal 324 x 229 x 50 mm Plain 140 gsm White Pack of 100
    Purely EcoCushion Gusset Envelopes C4 Peel & Seal 324 x 229 x 50 mm Plain 140 gsm White Pack of 100 Viking No. 1153184
    Only
    £97.49
    Pack
    £116.99 incl. VAT
    Temporarily sold out

    Do you want to receive a one-off e-mail when this item is back in stock?

  18. PREMIUM Woven Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm 9400 Plain 140 gsm Cream Wove Pack of 125
    PREMIUM Woven Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm 9400 Plain 140 gsm Cream Wove Pack of 125 Viking No. 1173857
    Only
    £98.49
    Pack
    £118.19 incl. VAT
    Temporarily sold out

    Do you want to receive a one-off e-mail when this item is back in stock?

  19. Creative Bright Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 140 gsm Pumpkin Orange Pack of 125
    Creative Bright Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 140 gsm Pumpkin Orange Pack of 125 Viking No. 1174083
    Only
    £109.00
    Pack
    £130.80 incl. VAT
    Temporarily sold out

    Do you want to receive a one-off e-mail when this item is back in stock?

  20. Creative Dark Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 140 gsm Jet Black Pack of 125
    Creative Dark Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm Plain 140 gsm Jet Black Pack of 125 Viking No. 1173866
    Only
    £137.00
    Pack
    £164.40 incl. VAT
    Temporarily sold out

    Do you want to receive a one-off e-mail when this item is back in stock?

  21. Creative Bright Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm 140 gsm 9061W Pillar Box Red Pack of 125
    Creative Bright Coloured Gusset Envelopes C4 Peel & Seal 324 x 229 x 25 mm 140 gsm 9061W Pillar Box Red Pack of 125 Viking No. 1162268
    Only
    £124.00
    Pack
    £148.80 incl. VAT
    Temporarily sold out

    Do you want to receive a one-off e-mail when this item is back in stock?

    Compare (max. 3 products)

    View comparison

    Customer service & Feedback

    Customer service ›

    Click here for help with a wide range of topics such as your account, ordering and delivery. Or call: 0330 128 1399

    Live Chat ›

    Weekdays 9am to 5pm

    Give us your feedback

    Tell us how we are doing! We would like to hear your opinion.

    ×