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C3 Envelopes

  • C3 White Luxury Pocket 180gsm Peel & Seal Envelopes [Qty 200] 324 x 457mm

    C3 White Luxury Pocket 180gsm Peel & Seal Envelopes [Qty 200] 324 x 457mm

    £77.40 excl. VAT (£92.88 incl. VAT)

    C3 White Luxury Pocket 180gsm Peel & Seal Envelopes. C3 size envelopes, designed to fit A3 papers - dimensions 324mm x 457mm. Made from luxury ...

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  • C3 White Gusset 140gsm Envelopes [Qty 125] 324 x 457 x 30mm

    C3 White Gusset 140gsm Envelopes [Qty 125] 324 x 457 x 30mm

    £38.16 excl. VAT (£45.79 incl. VAT)

    These C3 White Gusset Envelopes are made from high quality 140gsm paper and feature a peel and seal closure.  The gusset feature (these envelopes e...

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  • C3 White 350gsm Board Peel & Seal Envelopes [Qty 100] 330 x 457mm

    C3 White 350gsm Board Peel & Seal Envelopes [Qty 100] 330 x 457mm

    £28.00 excl. VAT (£33.60 incl. VAT)

    Box of 100 C3 White 350gsm Board Peel & Seal Envelopes size 330mm x 457mm. All board envelopes made from 350gsm card, ideal for protecting cont...

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  • C3 Silver Holographic Padded Bubble Bag [Qty 50] 320 x 450mm

    C3 Silver Holographic Padded Bubble Bag [Qty 50] 320 x 450mm

    £55.00 excl. VAT (£66.00 incl. VAT)

    C3 Silver Holographic Padded Bubble Bag. Add some spangle to your mailing and get noticed in the post with these silver holographic bubble bags! Pa...

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  • C3 Silver Holographic Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    C3 Silver Holographic Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    320 x 450 C3 Silver Holographic foil Postal envelopes / Bags

  • C3 Silver Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    C3 Silver Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    £90.00 excl. VAT (£108.00 incl. VAT)

    This is a C3 Silver gloss 350gsm all board envelope designed to fit A3 documents. This is a very high quality envelope, it will protect the content...

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  • C3 Silver Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    C3 Silver Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    320 x 450 C3 Silver foil Postal envelopes / Bags

  • C3 Red Holographic Foil Bags [Qty 100] 320 x 450mm

    C3 Red Holographic Foil Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    C3 Red Holographic Foil Bags. Want to stand apart from your competitors and make your customers feel special? Choose these red holographic metallic...

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  • C3 Red Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    C3 Red Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    £85.00 excl. VAT (£102.00 incl. VAT)

    This is a C3 Red gloss 350gsm all board envelope designed to fit A3 documents. This is a very high quality envelope, it will protect the contents a...

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  • C3 Red Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    C3 Red Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    320 x 450 C3 Red foil Postal envelopes / Bags

  • C3 Purple Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    C3 Purple Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    320 x 450 C3 Purple foil Postal envelopes / Bags

  • C3 Padded Envelopes [Qty 100] 350 x 470mm

    C3 Padded Envelopes [Qty 100] 350 x 470mm

    £34.00 excl. VAT (£40.80 incl. VAT)

    These white padded bubble bags are ideal for posting items that need a little protection. With white paper finish outer they are a nice alternative...

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  • C3 Orange Padded (Paper Finish) Bubble Envelopes [Qty 50] 320 x 450mm

    C3 Orange Padded (Paper Finish) Bubble Envelopes [Qty 50] 320 x 450mm

    £23.00 excl. VAT (£27.60 incl. VAT)

    C3 Orange (paper finish) Padded Envelopes. These padded bubble mailers have internal measurements of 320 x 450mm, which is called C3 and designed t...

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  • C3 Metallic Silver Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Silver Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Silver Padded Bubble Envelopes.  This silver padded mailer measures 320mm x 450mm and this is the internal measurement. This our larges...

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  • C3 Metallic Rose Gold Blush Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Rose Gold Blush Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Rose Gold Blush Padded Bubble Envelopes. Adorn your mail with opulent, blush tones with these stunning padded envelopes. As part of our...

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  • C3 Metallic Red Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Red Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Red Padded Bubble Envelopes. Box of 50 metallic red padded bubble mailers. These red padded envelopes measure 320mm x 450mm (internal m...

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  • C3 Metallic Purple Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Purple Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Purple Padded Bubble Envelopes . This Purple padded envelope measures 320mm x 450mm and this is the internal measurement. This our larg...

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  • C3 Metallic Hot Pink Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Hot Pink Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Hot Pink Padded Bubble Envelopes. These metallic pink bubble mailers are size C3, which is designed to fit A3 documents. Internal measu...

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  • C3 Metallic Green Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Green Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Green Padded Bubble Envelopes. These metallic bubble mailers are size C3, so designed to fit papers/documents of size A3. Internal meas...

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  • C3 Metallic Gold Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Gold Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Gold Padded Bubble Envelopes. These shiny metallic bubble mailers come in size C3, which is designed to fit papers/documents of size A3...

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  • C3 Metallic Blue Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Blue Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Blue Padded Bubble Envelopes. These metallic blue bubble mailers are size C3 which is designed to fit A3 papers. The padded bubble wrap...

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  • C3 Metallic Black Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Metallic Black Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Metallic Black Padded Bubble Envelopes. Black metallic bubble mailers in size C3 to fit A3 paper size. The internal measurements of each envelop...

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  • C3 Matt Silver Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Matt Silver Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    Matt Silver padded bubble envelopes come in 6 sizes. This Silver padded envelope measures 320mm x 450mm and this is the internal measurement. This ...

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  • C3 Matt Rose Gold Blush Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Matt Rose Gold Blush Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £55.00 excl. VAT (£66.00 incl. VAT)

    C3 Matt Rose Gold Blush Padded Bubble Envelopes. Adorn your mail with opulent, blush tones with these stunning padded envelopes. As part of our 'On...

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  • C3 Matt Red Padded (Paper Finish) Bubble Envelopes [Qty 50] 320 x 450mm

    C3 Matt Red Padded (Paper Finish) Bubble Envelopes [Qty 50] 320 x 450mm

    £23.00 excl. VAT (£27.60 incl. VAT)

    C3 Matt Red Padded (Paper Finish) Bubble Envelopes. C3 red matt padded bubble mailer envelopes with paper finish outer to fit A3 size documents. In...

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  • C3 Matt Navy Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Matt Navy Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    C3 Matt Navy Padded Bubble Envelopes. These navy blue colour mailer bubble bags have a matt finish to the outer, giving a really luxurious appearan...

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  • C3 Matt Gold Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    C3 Matt Gold Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00 excl. VAT (£57.60 incl. VAT)

    Matt Gold padded bubble envelopes come in 6 sizes. This Gold padded envelope measures 320mm x 450mm and this is the internal measurement. This enve...

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  • C3 Matt Black Padded Bubble Envelopes [Qty 50] 320mm x 450mm
    Clearance

    C3 Matt Black Padded Bubble Envelopes [Qty 50] 320mm x 450mm

    £48.00
    £40.00 excl. VAT (£48.00 incl. VAT)

    Matt Black padded bubble envelopes come in 6 sizes. This Black padded envelope measures 320mm x 450mm and this is the internal measurement. This en...

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  • C3 Matt Black Padded (Paper Finish) Bubble Envelopes [Qty 50] 320 x 450mm

    C3 Matt Black Padded (Paper Finish) Bubble Envelopes [Qty 50] 320 x 450mm

    £23.00 excl. VAT (£27.60 incl. VAT)

    320 x 450mm C3 size Black Matt Padded Bubble Envelopes When ordering tiered quantities of 48 and above delivery will be by pallet. 

  • C3 Manilla Gusset Pocket 140gsm Peel & Seal Envelopes [Qty 125] 324 x 457 x 30mm

    C3 Manilla Gusset Pocket 140gsm Peel & Seal Envelopes [Qty 125] 324 x 457 x 30mm

    £38.16 excl. VAT (£45.79 incl. VAT)

    C3 manilla pocket envelopes with 30mm gusset. Made from high quality 140gsm thickness paper, with peel & seal flap. Envelope size 324 x 457 x 3...

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  • C3 Green Holographic Foil Bags [Qty 100] 320 x 450mm

    C3 Green Holographic Foil Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    C3 Green Holographic Foil Bags. Want to stand apart from your competitors and make your customers feel special? Choose these green holographic meta...

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  • C3 Green Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    C3 Green Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    £85.00 excl. VAT (£102.00 incl. VAT)

    This is a C3 Green gloss 350gsm all board envelope designed to fit A3 documents. This is a very high quality envelope, it will protect the contents...

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  • C3 Green Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    C3 Green Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    320 x 450 C3 Green foil Postal envelopes / Bags

  • C3 Gold Holographic Foil Bags [Qty 100] 320 x 450mm

    C3 Gold Holographic Foil Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    C3 Gold Holographic Foil Bags. Want to stand apart from your competitors and make your customers feel special? Choose these gold holographic metall...

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  • C3 Gold Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    C3 Gold Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    £90.00 excl. VAT (£108.00 incl. VAT)

    This is a C3 Gold gloss 350gsm all board envelope designed to fit A3 documents. This is a very high quality envelope, it will protect the contents ...

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  • C3 Gold Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    C3 Gold Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    320 x 450 C3 Gold foil Postal envelopes / Bags

  • C3 Blue Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    C3 Blue Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    £85.00 excl. VAT (£102.00 incl. VAT)

    This is a C3 Blue gloss 350gsm all board envelope designed to fit A3 documents. This is a very high quality envelope, it will protect the contents ...

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  • C3 Blue Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    C3 Blue Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    320 x 450 C3 Blue foil Postal envelopes / Bags

  • C3 Black Luxury 180gsm Peel & Seal Envelopes [Qty 200] 324 x 457mm

    C3 Black Luxury 180gsm Peel & Seal Envelopes [Qty 200] 324 x 457mm

    £75.00 excl. VAT (£90.00 incl. VAT)

    C3 Black Luxury 180gsm Peel & Seal Envelopes. Luxury C3 size black 180gsm envelopes, to fit A3 papers and documents - envelope dimensions are 3...

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  • C3 Black Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    C3 Black Gloss 350gsm All Board Envelopes [Qty 100] 330 x 457mm

    £85.00 excl. VAT (£102.00 incl. VAT)

    This is a C3 Black gloss 350gsm all board envelope designed to fit A3 documents. This is a very high quality prestigous envelope and will protect t...

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  • C3 Black Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    C3 Black Foil Postal Envelopes / Bags [Qty 100] 320 x 450mm

    £57.00 excl. VAT (£68.40 incl. VAT)

    320 x 450 C3 Black foil Postal envelopes / Bags

  • C3 (A3) Board Back Envelopes - Please Do Not Bend [Qty 50] 324 x 457mm

    C3 (A3) Board Back Envelopes - Please Do Not Bend [Qty 50] 324 x 457mm

    £12.98 excl. VAT (£15.58 incl. VAT)

    C3 size manilla board backed envelopes to fit A3 documents. Heavy duty 120gsm manilla paper to front printed with 'Please Do Not Bend' and hard bac...

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Select from a huge range of C3 Envelopes

If you’re looking to send A3 sized letters, then C3 envelopes are just what you’re looking for. Available in a huge variety of shapes, sizes and colours, our huge range of C3 envelopes is sure to contain something that perfectly matches your needs.

The specific dimensions of a C3 envelope are 324 x 458 mm or 12.8 x 18 in. Alongside the traditional gummed options, we also stock peel and seal C6 envelopes, A6 sized foil postage bags, and string and washer options for a more striking presentation. Looking to send wedding or christening invites? You might also be interested in our decorative butterfly envelopes, which come in a range of pastel hues.

Don’t forget that we offer next day delivery on all bulk envelope purchases. We’d also be more than happy to send you a free sample if you’d like to see our C6 envelopes first hand before you commit to a large purchase. For more information, please call us for a friendly and informative chat.