Bong-uk-ltd Gusset Envelopes
Here you can find our huge range of high quality gusset envelopes. These envelopes will take a larger amount of paper compared to a standard envelope. We have a range of envelope sizes including the common C4 gusset and C5 options. Generally gusset envelopes with a window and without have the same closure type (peel and seal) which gives a longer shelf life.
There are a few different closure options available which include peel and seal, gummed as well as self seal envelopes. We also have a variety of colours and strengths. Gusset envelopes also have the added option of how wide you would like them to expand. Generally this is around 25mm however there are options of up to 50mm. A popular option is the New Guardian heavyweight Envelopes peel and seal. These are made using 130gsm manilla paper making them stronger and able to withstand the postal process.
If you cannot find the Gusset Envelopes you are looking for or have any questions regarding any of our products then why not call our friendly UK team, they are always happy to answer any questions or help you in your search.
Our top sellers in Gusset Envelopes
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Best Seller
57% off
rrp £35.76
rrp £42.91
ValueX Everyday Envelopes C4 Manilla Pocket Plain Peel and Seal 25mm G ...
£15.21 £18.25 -
Best Seller
61% off
rrp £42.48
rrp £50.98
ValueX Everyday Envelopes C4 White Pocket Plain Peel and Seal 25mm Gus ...
£16.44 £19.73 -
Best Seller
61% off
rrp £43.76
rrp £52.51
ValueX Everyday Envelopes C4 White Pocket Window Peel and Seal 25mm Gu ...
£17.16 £20.59 -
Best Seller
59% off
rrp £48.04
rrp £57.65
Blake Everyday Envelopes C5 White Pocket Plain Peel and Seal 25mm Guss ...
£19.86 £23.83 -
Best Seller
58% off
rrp £50.48
rrp £60.58
Blake Everyday Envelopes C5 Manilla Pocket Plain Peel and Seal 25mm Gu ...
£20.95 £25.14
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New Guardian C4 Envelopes Gusset PeelSeal Manilla (Pack of 25) F27666 JDF27666
Ideal for mailing bulky items such as catalogues, reports, brochures and more, these ...
SAVE 46% off RRP
Only £21.85 inc VAT£18.21 exc VAT
Product Code: JDF27666
Stock: 18
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New Guardian C4 Envelopes Gusset 130gsm Manilla (Pack of 100) E27266 JDE27266
Ideal for mailing bulky items such as catalogues, reports, brochures and more, these ...
SAVE 52% off RRP
Only £69.16 inc VAT£57.63 exc VAT
Product Code: JDE27266
Stock: 149
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Plus Fabric Gusset C4 Envelopes Peel and Seal 120gsm White (Pack of 100) C26766 JDC26766
Ideal for mailing bulky items such as catalogues, reports, brochures and more, these ...
SAVE 51% off RRP
Only £90.58 inc VAT£75.48 exc VAT
Product Code: JDC26766
Stock: 31
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Plus Fabric Gusset C4 Envelopes Window Peel and Seal 120gsm White (Pack of 100) C27566 JDC27566
Ideal for mailing bulky items such as catalogues, reports, brochures and more, these ...
SAVE 47% off RRP
Only £105.58 inc VAT£87.98 exc VAT
Product Code: JDC27566
Stock: 15
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New Guardian Envelopes Mini Pack Peel & Seal Gusset 130gsm C4 324x229x25mm Manilla F27666 [Pack ...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 38% off RRP
Only £20.98 inc VAT£17.48 exc VAT
Product Code: 4039554
In stock
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Tyvek Gusseted Envelopes Extra Capacity Strong B4A H330xW250xD38mm 55gsm P&S White 67181 [Pack 20] 3...
Thinking about using a box or padded envelope? Why not use a lightweight yet robust T...
SAVE 55% off RRP
Only £42.47 inc VAT£35.39 exc VAT
Product Code: 397009
In stock
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New Guardian Envelopes FSC Hvyweight Peel & Seal Gusset 130gsm 241x165x25mm Manilla L27306 [Pack...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 38% off RRP
Only £49.63 inc VAT£41.36 exc VAT
Product Code: 315347
In stock
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eGreen Packaging By Bong Ecommerce Mailing Envelopes C5 Manilla Double Peel and Seal 40mm Gusset 110...
e-Green Mailing Envelopes the smarter paper mailer for ecommerce. e-green is the pac...
SAVE 66% off RRP
Only £50.03 inc VAT£41.69 exc VAT
Product Code: EXR59331BG
Stock: 7
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New Guardian Pocket Gusset Envelope C4 Peel and Seal Plain Power-Tac 25mm Gusset 130gsm Manilla (Pac...
Send bulky items with confidence in these high quality manilla gusset envelopes which...
SAVE 53% off RRP
Only £55.25 inc VAT£46.04 exc VAT
Product Code: EXR58717BG
Stock: 21
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New Guardian Pocket Gusset Envelope C4 Peel and Seal Window Power-Tac 25mm Gusset 130gsm Manilla (Pa...
Send bulky items with confidence in these high quality manilla gusset envelopes which...
SAVE 52% off RRP
Only £61.45 inc VAT£51.21 exc VAT
Product Code: EXR58724BG
Stock: 42
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eGreen Packaging By Bong Ecommerce Mailing Envelopes C4+ Manilla Double Peel and Seal 50mm Gusset 11...
e-Green Mailing Envelopes the smarter paper mailer for ecommerce. e-green is the pac...
SAVE 66% off RRP
Only £67.38 inc VAT£56.15 exc VAT
Product Code: EXR59338BG
Stock: 3
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eGreen Packaging By Bong Ecommerce Mailing Envelopes Manilla Double Peel and Seal 100mm Gusset 110gs...
e-Green Mailing Envelopes the smarter paper mailer for ecommerce. e-green is the pac...
SAVE 66% off RRP
Only £68.64 inc VAT£57.20 exc VAT
Product Code: EXR59359BG
Stock: 5
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E-Green C5 40mm Gusset Peel and Seal Mailer (Pack of 250) 69112 JD66440
Ideal for mailing bulky items such as catalogues, reports and brochures, these E-Gree...
SAVE 52% off RRP
Only £68.74 inc VAT£57.28 exc VAT
Product Code: JD66440
Stock: 3
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New Guardian Envelopes FSC Hvyweight Peel & Seal Gusset 130gsm C4 324x229x25mm Man E27266 [Pack ...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 38% off RRP
Only £73.64 inc VAT£61.37 exc VAT
Product Code: 311382
In stock
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eGreen Packaging By Bong Ecommerce Mailing Envelopes Manilla Double Peel and Seal 100mm Gusset 110gs...
e-Green Mailing Envelopes the smarter paper mailer for ecommerce. e-green is the pac...
SAVE 66% off RRP
Only £73.91 inc VAT£61.59 exc VAT
Product Code: EXR59366BG
Stock: 5
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New Guardian Envelopes FSC Hvyweight Peel & Seal Gusset 130gsm 305x250x25mm Manilla B27166 [Pack...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 38% off RRP
Only £75.68 inc VAT£63.07 exc VAT
Product Code: 311384
In stock
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Plus Fabric Pocket Gusset Envelope C4 Peel and Seal Window Power-Tac 25mm Gusset 120gsm White (Pack ...
Professionalism, appearance and protection are at the heart of Plus Fabric envelopes,...
SAVE 53% off RRP
Only £77.30 inc VAT£64.42 exc VAT
Product Code: EXR58927BG
Stock: 22
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New Guardian Envelopes FSC Peel & Seal Window Gusset 130gsm C4 324x229x25mm Manilla J27366 [Pack...
New Guardian manilla C4 envelopes are made from strong two-tone 130gsm premium paper,...
SAVE 38% off RRP
Only £79.73 inc VAT£66.44 exc VAT
Product Code: 315357
In stock
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Plus Fabric Pocket Gusset Envelope C4 Peel and Seal Plain Power-Tac 25mm Gusset 120gsm White (Pack 1...
Professionalism, appearance and protection are at the heart of Plus Fabric envelopes,...
SAVE 47% off RRP
Only £80.98 inc VAT£67.48 exc VAT
Product Code: EXR58934BG
Stock: 8
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New Guardian Envelopes Heavyweight Peel & Seal Gusset 130gsm 350x248x25mm Manilla M29066 [Pack 1...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 38% off RRP
Only £83.63 inc VAT£69.69 exc VAT
Product Code: 4039679
In stock
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Plus Fabric Envelopes PEFC Peel & Seal Gusset 120gsm C4 324x229x25mm White C26766 [Pack 100] 315...
Plus Fabric Gusset envelopes provide sturdy support to protect important documents, e...
SAVE 42% off RRP
Only £88.37 inc VAT£73.64 exc VAT
Product Code: 315538
In stock
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New Guardian Envelopes FSC Hvyweight Peel & Seal Gusset 130gsm 381x254x25mm Manilla M27466 [Pack...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 38% off RRP
Only £91.04 inc VAT£75.87 exc VAT
Product Code: 311386
In stock
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New Guardian Armour Gusset Envelope C4 Peel and Seal Plain Power-Tac 50mm Gusset 130gsm Manilla (Pac...
New Guardian Armour gusset envelopes. Reinforced in a grid pattern with a woven polye...
SAVE 52% off RRP
Only £94.78 inc VAT£78.98 exc VAT
Product Code: EXR58787BG
Stock: 28
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E-Green C4 Plus 50mm Gusset Peel and Seal Mailer (Pack of 250) 69113 JD66441
Ideal for mailing bulky items such as catalogues, reports and brochures, these E-Gree...
SAVE 52% off RRP
Only £95.30 inc VAT£79.42 exc VAT
Product Code: JD66441
Stock: 2
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Plus Fabric Envelopes PEFC Wdw Peel & Seal Gusset 120gsm C4 324x229x25mm White C27566 [Pack 100]...
Suitable for all general office correspondence, these Plus Fabric envelopes are made ...
Only £95.41 inc VAT£79.51 exc VAT
Product Code: 315478
In stock
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Tyvek Gusseted Envelopes Extra Capacity Strong C4 H324xW229xD38mm 55gsm P&S White 11841 [Pack 100] 3...
Extra capacity, ideal for mailing really bulky and awkward shaped mail. Amazingly lig...
SAVE 73% off RRP
Only £102.28 inc VAT£85.23 exc VAT
Product Code: 319745
In stock
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eGreen Packaging By Bong Ecommerce Mailing Envelopes C3+ Manilla Double Peel and Seal 80mm Gusset 11...
e-Green Mailing Envelopes the smarter paper mailer for ecommerce. e-green is the pac...
SAVE 66% off RRP
Only £106.13 inc VAT£88.44 exc VAT
Product Code: EXR59352BG
Stock: 2
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New Guardian Envelopes FSC Hvyweight Peel & Seal Gusset 130gsm 406x305x25mm Manilla B27326 [Pack...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 36% off RRP
Only £111.43 inc VAT£92.86 exc VAT
Product Code: 311388
In stock
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eGreen Packaging By Bong Ecommerce Mailing Envelopes C3+ Manilla Double Peel and Seal 120mm Gusset 1...
e-Green Mailing Envelopes the smarter paper mailer for ecommerce. e-green is the pac...
SAVE 66% off RRP
Only £113.71 inc VAT£94.76 exc VAT
Product Code: EXR59345BG
Stock: 3
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New Guardian Armour Envelopes C4 Gusset 50mm Peel And Seal 130gsm Kraft Manilla A28113 [Pack 100] 35...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 38% off RRP
Only £122.81 inc VAT£102.34 exc VAT
Product Code: 359910
In stock
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E-Green C3 Plus 80mm Gusset Peel and Seal Mailer (Pack of 200) 69115 JD66443
Ideal for mailing bulky items such as catalogues, reports and brochures, these E-Gree...
SAVE 52% off RRP
Only £150.67 inc VAT£125.56 exc VAT
Product Code: JD66443
Stock: 7
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Tyvek Gusseted Envelopes Extra Capacity Strong E4 H406xW305xD50mm 55gsm P&S White 11846 [Pack 100] 3...
Extra capacity, ideal for mailing really bulky and awkward shaped mail. Size E4 (406x...
SAVE 73% off RRP
Only £160.56 inc VAT£133.80 exc VAT
Product Code: 319750
In stock
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New Guardian Armour Gusset Envelope 380x280mm Peel and Seal Plain Power-Tac 50mm Gusset 130gsm Manil...
New Guardian Armour gusset envelopes. Reinforced in a grid pattern with a woven polye...
SAVE 47% off RRP
Only £165.83 inc VAT£138.19 exc VAT
Product Code: EXR58808BG
Stock: 12
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Tyvek Pocket Gusset Envelope 406x305mm Peel and Seal 50mm Gusset 55gsm White (Pack 100) - 11846 6128...
Extra capacity, ideal for mailing really bulky and awkward shaped mail. Size E4 (406x...
SAVE 46% off RRP
Only £170.83 inc VAT£142.36 exc VAT
Product Code: EXR61286BG
Stock: 21
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Tyvek Gusseted Envelopes Extra Capacity Strong D4A H381xW250xD50mm 55gsm P&S White 11844 [Pack 100] ...
Extra capacity, ideal for mailing really bulky and awkward shaped mail. Size D4A (381...
SAVE 70% off RRP
Only £186.26 inc VAT£155.22 exc VAT
Product Code: 319752
In stock
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New Guardian Armour Envelopes 380x280mm Gusset 50mm Peel&Seal 130gsm Kraft Manilla H28313 [Pack 100]...
New Guardian manilla envelopes are made from strong environmentally friendly two-tone...
SAVE 38% off RRP
Only £195.32 inc VAT£162.77 exc VAT
Product Code: 359945
In stock
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New Guardian Armour Envelope 381x279x50mm Manilla (Pack of 100) H28313 JDH28313
These New Guardian Armour gusset envelopes are made from durable, heavyweight 130gsm ...
SAVE 47% off RRP
Only £201.77 inc VAT£168.14 exc VAT
Product Code: JDH28313
Stock: 12
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New Guardian Envelope PSeal 381x254x25mm Manilla (Pack of 100) M27466 JDM27466
Ideal for mailing bulky items such as catalogues, reports, brochures and more, these ...
SAVE 49% off RRP
Only £90.06 inc VAT£75.05 exc VAT
Product Code: JDM27466
Stock: out of stock
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New Guardian Envelope Gusset 406x305x25mm Manilla (Pack of 100) B27326 JDB27326
Ideal for mailing bulky items such as catalogues, reports, brochures and more, these ...
SAVE 66% off RRP
Only £92.62 inc VAT£77.18 exc VAT
Product Code: JDB27326
Stock: out of stock
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New Guardian Armour C4 Envelopes Gusset Manilla (Pack of 100) A28113 JDA28113
These New Guardian Armour gusset envelopes are made from durable, heavyweight 130gsm ...
SAVE 47% off RRP
Only £127.01 inc VAT£105.84 exc VAT
Product Code: JDA28113
Stock: out of stock
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New Guardian Gusset Envelope 381 x 254mm Peel and Seal Plain Power-Tac 25mm Gusset 130gsm Manilla (P...
Send bulky items with confidence in these high quality manilla gusset envelopes which...
SAVE 53% off RRP
Only £69.02 inc VAT£57.52 exc VAT
Product Code: EXR58759BG
Stock: out of stock