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Plain Envelopes

Plain envelopes can be bought from us in a variety of colours such as white and manilla, as well as multiple sizes like C4, C5 and DL.

Plain Envelopes
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We found 59 products
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County Stationery Peel and Seal Envelopes 90gsm C4 White (500 Pack) C509

County Stationery Peel and Seal Envelopes 90gsm C4 White 500 Pack C509 523194 F
500
Pack
  • Pack Size: 500 envelopes (20 sets of 25)
  • Ideal For: Business mail, invoices & important documents
  • Closure Type: Self-seal adhesive for a secure finish
  • Paper Weight: Durable 90gsm paper
£64.03
£53.36 ex. VAT
£53.36
£64.03 inc. VAT
£64.03
£53.36 ex. VAT
£53.36
£64.03 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

New Guardian Strong Pocket Envelopes Peel/Seal 130gsm DL Manilla (500 Pack) E26503

New Guardian Strong Pocket Envelopes Peel Seal 130gsm DL Manilla 500 Pack E26503 103498 F
500
Pack
  • 500 Premium Envelopes: Pack contains 500 manilla envelopes
  • Strong and Durable: Built to withstand tough postal handling
  • Secure Peel and Seal: Reliable closure for a professional finish
  • DL Size: Ideal for standard letters and documents
£55.48
£46.23 ex. VAT
£46.23
£55.48 inc. VAT
£55.48
£46.23 ex. VAT
£46.23
£55.48 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Padded 50mm Gusset Envelopes Peel and Seal 140gsm C5 White (100 Pack) KF3530

Q Connect Padded 50mm Gusset Envelopes Peel and Seal 140gsm C5 White 100 Pack KF3530 113243 F
100
Pack
  • Size: C5 (229 x 162 x 50mm) - Perfect for documents & small parcels.
  • 100-Pack: Includes 100 envelopes per pack for ample supply.
  • Durable Protection: Robust construction with corrugated middle resists damage.
  • Eco-Friendly: Made from 100% recycled materials & fully recyclable.
£59.19
£49.32 ex. VAT
£49.32
£59.19 inc. VAT
£59.19
£49.32 ex. VAT
£49.32
£59.19 inc. VAT

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Order now for dispatch tomorrow

Basildon Bond Pocket Envelope 120gsm C4 White (250 Pack) M80120

Basildon Bond Pocket Envelope 120gsm C4 White 250 Pack M80120 106610 F
250
Pack

  • Pack of 250 plain white C4 envelopes

  • Suitable for A4 documents & standard business correspondence

  • Made from 120gsm 100% recycled paper

  • Features a peel and seal closure & opaque green interior

£69.07
£57.56 ex. VAT
£57.56
£69.07 inc. VAT
£69.07
£57.56 ex. VAT
£57.56
£69.07 inc. VAT

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Order now for dispatch tomorrow

Plus Fabric 25mm Gusset Envelopes Peel and Seal 120gsm C4 White (100 Pack) C26766

Plus Fabric 25mm Gusset Envelopes Peel and Seal 120gsm C4 White 100 Pack C26766 101568 F
100
Pack
  • Suitable for A4 documents
  • 25mm expanding gusset for bulky mail
  • Made from strong 120gsm paper
  • Easy peel and seal closure
£105.97
£88.31 ex. VAT
£88.31
£105.97 inc. VAT
£105.97
£88.31 ex. VAT
£88.31
£105.97 inc. VAT

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Order now for dispatch tomorrow

New Guardian Envelope 25mm Gusset P/Seal 130gsm 381x254mm Manilla (100 Pack) M27466

New Guardian Envelope 25mm Gusset P Seal 130gsm 381x254mm Manilla 100 Pack M27466 106599 F
100
Pack
  • Pack Size: 100 manilla envelopes
  • Expanding Gusset: 25mm for thicker contents
  • Durable Paper: Crafted from 130gsm paper
  • Secure Closure: Features a simple peel and seal with Power-Tac adhesion
£102.32
£85.27 ex. VAT
£85.27
£102.32 inc. VAT
£102.32
£85.27 ex. VAT
£85.27
£102.32 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Gusset Envelope 140gsm B4 Manilla (125 Pack) KF08898

Q Connect Gusset Envelope 140gsm B4 Manilla 125 Pack KF08898 766962 F
125
Pack
  • Holds bulky items with a 25mm expanding gusset.
  • Pack of 125 B4 manilla envelopes.
  • Durable 140gsm paper for reliable protection.
  • Features a strong peel and seal closure for security.
£27.46
£22.88 ex. VAT
£22.88
£27.46 inc. VAT
£27.46
£22.88 ex. VAT
£22.88
£27.46 inc. VAT

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Order now for dispatch tomorrow

New Guardian 50mm Gusset Armour Envelope 130gsm 381x279mm Manilla (100 Pack) H28313

New Guardian 50mm Gusset Armour Envelope 130gsm 381x279mm Manilla 100 Pack H28313 103116 F
100
Pack
  • Durable & Secure: 100 heavyweight manilla envelopes for safe mailing.
  • Expanding Gusset: 50mm gusset accommodates bulky items.
  • Strong Closure: Peel and seal with reliable Power-Tac adhesion.
  • Reinforced Material: 130gsm paper with woven polyester for exceptional strength.
£221.42
£184.52 ex. VAT
£184.52
£221.42 inc. VAT
£221.42
£184.52 ex. VAT
£184.52
£221.42 inc. VAT

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Order now for dispatch tomorrow

Blake Wallet Envelope Peel and Seal 120gsm C5 Black (250 Pack) BLK93027

Blake Wallet Envelope Peel and Seal 120gsm C5 Black 250 Pack BLK93027 453103 F
250
Pack
  • Size: C5 – fits A4 folded or A5 documents.
  • Closure: Peel and seal for secure mailing.
  • Quantity: 250 envelopes per pack.
  • Colour: Jet Black – adds a sophisticated touch.
£83.04
£69.20 ex. VAT
£69.20
£83.04 inc. VAT
£83.04
£69.20 ex. VAT
£69.20
£83.04 inc. VAT

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Order now for dispatch tomorrow

Bong E-Green Plus 80mm Gusset Peel and Seal Mailer 120gsm C3 Manilla (200 Pack) 69115

Bong E Green Plus 80mm Gusset Peel and Seal Mailer 120gsm C3 Manilla 200 Pack 69115 611752 F
200
Pack
  • Durable & Waterproof: Crafted from 120gsm Kraft paper for reliable protection.
  • Extra Capacity: 80mm gusset accommodates thicker, bulkier items.
  • Secure Closure: Peel and seal design ensures a tamper-evident finish.
  • Convenient Features: Includes easy opening and a return address strip.
£146.55
£122.12 ex. VAT
£122.12
£146.55 inc. VAT
£146.55
£122.12 ex. VAT
£122.12
£146.55 inc. VAT

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Order now for dispatch tomorrow

Bong E-Green 50mm Gusset Peel and Seal Mailer 120gsm C4 Manilla (250 Pack) 69113

Bong E Green 50mm Gusset Peel and Seal Mailer 120gsm C4 Manilla 250 Pack 69113 611751 F
250
Pack
  • Durable & Waterproof: Crafted from 120gsm Kraft paper for reliable protection.
  • Generous Gusset: Features a 50mm gusset for thicker contents.
  • Convenient Closure: Easy-peel and seal with a tamper-evident seal & return strip.
  • Pack of 250: Ideal for mailing catalogues, reports, and brochures.
£85.04
£70.87 ex. VAT
£70.87
£85.04 inc. VAT
£85.04
£70.87 ex. VAT
£70.87
£85.04 inc. VAT

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Order now for dispatch tomorrow

Blake Wallet Envelope Peel and Seal 120gsm C5 Yellow (250 Pack) BLK93019

Blake Wallet Envelope Peel and Seal 120gsm C5 Yellow 250 Pack BLK93019 453097 F
250
Pack
  • Colour: Bright Banana Yellow – makes mail stand out.
  • Size: C5 – fits A4 folded or A5 unfolded.
  • Closure: Peel and seal for quick dispatch.
  • Pack Size: 250 envelopes per pack.
£47.17
£39.31 ex. VAT
£39.31
£47.17 inc. VAT
£47.17
£39.31 ex. VAT
£39.31
£47.17 inc. VAT

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Order now for dispatch tomorrow

Blake Wallet Envelope Peel and Seal 120gsm C5 Red (250 Pack) BLK93020

Blake Wallet Envelope Peel and Seal 120gsm C5 Red 250 Pack BLK93020 453098 F
250
Pack
  • Vibrant Red C5 Envelopes: Make your mail stand out.
  • Quality 120gsm Paper: Professional finish & reliable protection.
  • Peel & Seal Closure: Secure and easy to use.
  • Bulk Pack of 250: Ideal for businesses & frequent use.
£74.56
£62.13 ex. VAT
£62.13
£74.56 inc. VAT
£74.56
£62.13 ex. VAT
£62.13
£74.56 inc. VAT

Order now for dispatch tomorrow

Order now for dispatch tomorrow

Q-Connect Padded 50mm Gusset Envelopes Peel and Seal 140gsm E4 White (100 Pack) KF3533

Q Connect Padded 50mm Gusset Envelopes Peel and Seal 140gsm E4 White 100 Pack KF3533 109137 F
100
Pack
  • Protective Padding: Robust 140gsm cover with corrugated & 90gsm inner layers.
  • Expanding Gusset: 50mm gusset accommodates bulkier items.
  • Recycled & Recyclable: Made from 100% recycled materials.
  • Convenient Closure: Features a peel and seal closure for easy mailing.
£195.29
£162.74 ex. VAT
£162.74
£195.29 inc. VAT
£195.29
£162.74 ex. VAT
£162.74
£195.29 inc. VAT

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Order now for dispatch tomorrow

Kraft Mailing Bag 100mm Gusset 100gsm 580x465mm Manilla (50 Pack) KMB580

Kraft Mailing Bag 100mm Gusset 100gsm 580x465mm Manilla 50 Pack KMB580 786652 F
50
Pack
  • Eco-Friendly: Made from 100% recyclable, compostable & biodegradable paper.
  • Dimensions: 580x465x100mm with a 100mm lip.
  • UK Made: Manufactured in the UK for reduced carbon footprint.
  • Reusable & Convenient: Features twin peel and seal strips for easy reuse & returns.
£32.39
£26.99 ex. VAT
£26.99
£32.39 inc. VAT
£32.39
£26.99 ex. VAT
£26.99
£32.39 inc. VAT

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Order now for dispatch tomorrow

Blake Wallet Envelope Peel and Seal 130gsm C5 Metallic Gold (250 Pack) BLK93029

Blake Wallet Envelope Peel and Seal 130gsm C5 Metallic Gold 250 Pack BLK93029 453105 F
250
Pack
  • Pack Size: 250 Metallic Gold envelopes.
  • Paper Weight: Crafted from high-quality 130gsm paper.
  • Envelope Size: C5 – fits A4 folded or A5 unfolded.
  • Closure Type: Convenient Peel and Seal for easy mailing.
£140.90
£117.42 ex. VAT
£117.42
£140.90 inc. VAT
£140.90
£117.42 ex. VAT
£117.42
£140.90 inc. VAT

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Order now for dispatch tomorrow

Bong E-Green 40mm Gusset Peel and Seal Mailer 210gsm C5 Manilla (250 Pack) 69112

Bong E Green 40mm Gusset Peel and Seal Mailer 210gsm C5 Manilla 250 Pack 69112 611750 F
250
Pack
  • Pack of 250: Ideal for bulk mailing needs.
  • 40mm Gusset: Provides extra space for thicker items.
  • Waterproof & Durable: Made from 120gsm Kraft paper.
  • Peel & Seal Closure: Includes a tamper-evident seal and return strip.
£63.98
£53.32 ex. VAT
£53.32
£63.98 inc. VAT
£63.98
£53.32 ex. VAT
£53.32
£63.98 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelope 25mm Gusset Peel and Seal 305x254 Manilla (100 Pack) KF3526

Q Connect Envelope 25mm Gusset Peel and Seal 305x254 Manilla 100 Pack KF3526 112032 F
100
Pack
  • Dimensions: 305 x 254 x 25mm
  • 25mm expanding gusset for bulky items
  • Pack of 100 durable 120gsm manilla envelopes
  • Strong peel and seal closure for secure mailing
£34.27
£28.56 ex. VAT
£28.56
£34.27 inc. VAT
£34.27
£28.56 ex. VAT
£28.56
£34.27 inc. VAT

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Order now for dispatch tomorrow

Kraft Mailing Bag 100mm Gusset 100gsm 415x495mm Manilla (50 Pack) KMB415

Kraft Mailing Bag 100mm Gusset 100gsm 415x495mm Manilla 50 Pack KMB415 786651 F
50
Pack
  • Eco-Friendly: Made from 100% recyclable, compostable & biodegradable paper.
  • Expanding Gusset: Accommodates varying contents with extra space.
  • Reusable Design: Twin peel & seal strips enable easy re-sealing & returns.
  • UK Manufactured: Robust and lightweight alternative to cardboard boxes.
£26.61
£22.17 ex. VAT
£22.17
£26.61 inc. VAT
£26.61
£22.17 ex. VAT
£22.17
£26.61 inc. VAT

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Order now for dispatch tomorrow

Q-Connect Envelope 25mm Gusset Peel and Seal 120gsm 406x305mm Manilla (100 Pack) KF3529

Q Connect Envelope 25mm Gusset Peel and Seal 120gsm 406x305mm Manilla 100 Pack KF3529 141280 F
100
Pack
  • Dimensions: 406 x 305 x 25mm
  • Ideal for catalogues, reports & bulky items
  • 120gsm paper for durable mailing
  • Pack of 100 manilla envelopes with peel & seal closure
This item is out of stock

Q-Connect Envelope 25mm Gusset Peel and Seal 120gsm 406x305mm Manilla (100 Pack) KF3529

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Q-Connect Padded 50mm Gusset Envelopes Peel and Seal 140gsm C4 White (100 Pack) KF3531

Q Connect Padded 50mm Gusset Envelopes Peel and Seal 140gsm C4 White 100 Pack KF3531 181328 F
100
Pack
  • Durable Protection: Robust 3-layer construction resists damage during mailing.
  • Eco-Friendly Choice: Made from 100% recycled materials & fully recyclable.
  • C4 Size & 100-Pack: Includes 100 white C4 (324 x 229 x 50mm) envelopes.
  • Expanding Gusset & Easy Closure: Features a 50mm gusset for bulkier items and a convenient peel and seal closure.
This item is out of stock

Q-Connect Padded 50mm Gusset Envelopes Peel and Seal 140gsm C4 White (100 Pack) KF3531

Please enter your email address below and we will contact you as soon as this item becomes available. Your email will not be used for anything else.

Q-Connect Padded Gusset Envelopes Peel and Seal 140gsm B4 White (100 Pack) KF3532

Q Connect Padded Gusset Envelopes Peel and Seal 140gsm B4 White 100 Pack KF3532 108452 F
100
Pack

  • 100-pack of B4 envelopes: Dimensions 353 x 250 x 50mm, ideal for various goods.

  • Robust 3-layer construction: 140gsm/120gsm/90gsm layers for reliable protection during shipping.

  • Eco-friendly & Recyclable: Made from 100% recycled materials and fully recyclable.

  • Easy & Secure Closure: Features a convenient peel and seal closure with a 50mm expanding gusset.

This item is out of stock

Q-Connect Padded Gusset Envelopes Peel and Seal 140gsm B4 White (100 Pack) KF3532

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County Stationery Peel and Seal Envelopes 80gsm DL Manilla (1000 Pack) C520

County Stationery Peel and Seal Envelopes 80gsm DL Manilla 1000 Pack C520 523204 F
1000
Pack
  • Size: DL (110mm x 220mm) - Fits standard A4 paper.
  • Quantity: 1000 envelopes (20 packs of 50).
  • Convenient Closure: Peel and seal for quick, reliable sealing.
  • Durable Quality: Crafted from 80gsm paper for a quality feel.
This item is out of stock

County Stationery Peel and Seal Envelopes 80gsm DL Manilla (1000 Pack) C520

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Plain Envelopes

Find plain envelopes for your mailing and office requirements. Our extensive range includes a variety of sizes, including DL, C4, C5 and B4. Peel and seal and self seal options are also available.

We stock bulk packs to suit businesses and home offices, as well as a wide range of quantities. Choose from different paper weights and colours like white and manilla.

We have the right envelope for your letters, documents and invoices. Envelopes with recycled paper are also available here.

Find more types of envelopes in our full range.

Frequently Asked Questions

Q. Will C5 envelopes fit A4 paper?

Q. What is a windowless envelope?