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C3 Envelopes (324mm x 450mm)

Check out our full range of C3 envelopes with dimensions of 324mm x 450mm. These envelopes fit A3 paper without folding it. Our envelopes in this category are all at the very minimum 115GSM which means they are very high quality, thick enough to ensure whatever you send reaches your destination in one piece. With low prices, large stock and next working day delivery if ordered before 2pm why shop for C3 envelopes anywhere else? 

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C3 -  Manilla Commercial Envelopes - 115gsm - Non Window - Self Seal

C3 - Manilla Commercial Envelopes - 115gsm - Non Window - Self Seal

Box of 125 £20.21 INC VAT (£16.84 EX VAT)
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C3 -  Manilla Commercial Envelopes - 115gsm - Non Window - Peel & Seal

C3 - Manilla Commercial Envelopes - 115gsm - Non Window - Peel & Seal

Box of 125 £20.41 INC VAT (£17.01 EX VAT)
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C3 - White Commercial Envelopes - 120gsm - Non Window - Peel & Seal

C3 - White Commercial Envelopes - 120gsm - Non Window - Peel & Seal

Box of 125 £25.50 INC VAT (£21.25 EX VAT)
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C3 - Manilla Board Back Envelopes - 120gsm - Non Window - Peel and Seal

C3 - Manilla Board Back Envelopes - 120gsm - Non Window - Peel and Seal

Box of 100 £31.09 INC VAT (£25.91 EX VAT)
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C3 - White Board Back Envelopes - 120gsm - Non Window - Peel and Seal

C3 - White Board Back Envelopes - 120gsm - Non Window - Peel and Seal

Box of 100 £38.28 INC VAT (£31.90 EX VAT)
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C3 - White All Board Envelopes - 350gsm - Tuck Flap

C3 - White All Board Envelopes - 350gsm - Tuck Flap

Box of 100 £42.06 INC VAT (£35.05 EX VAT)
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C3 - Seal Oil Black Padded Bubble Envelopes - Peel and Seal

C3 - Seal Oil Black Padded Bubble Envelopes - Peel and Seal

Box of 50 £58.81 £55.00 INC VAT (£45.83 EX VAT)
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C3 - Glamour Gold Padded Bubble Envelopes - Peel and Seal

C3 - Glamour Gold Padded Bubble Envelopes - Peel and Seal

Box of 50 £58.81 £55.00 INC VAT (£45.83 EX VAT)
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C3 - Party Pink Padded Bubble - Non Window - Peel and Seal

C3 - Party Pink Padded Bubble - Non Window - Peel and Seal

Box of 50 £58.81 £55.00 INC VAT (£45.83 EX VAT)
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C3 - Emerald Green Padded Bubble Envelopes - Peel and Seal

C3 - Emerald Green Padded Bubble Envelopes - Peel and Seal

Box of 50 £58.81 £55.00 INC VAT (£45.83 EX VAT)
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C3 - Purple Grape Padded Bubble Envelopes - Peel and Seal

C3 - Purple Grape Padded Bubble Envelopes - Peel and Seal

Box of 50 £58.81 £55.00 INC VAT (£45.83 EX VAT)
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C3 - Peacock Blue Padded Bubble Envelopes - Peel and Seal

C3 - Peacock Blue Padded Bubble Envelopes - Peel and Seal

Box of 50 £70.57 INC VAT (£58.81 EX VAT)
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C3 - Festive Red Padded Bubble Envelopes - Peel and Seal

C3 - Festive Red Padded Bubble Envelopes - Peel and Seal

Box of 50 £70.57 INC VAT (£58.81 EX VAT)
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C3 - Brushed Chrome Padded Bubble Envelopes - Peel and Seel

C3 - Brushed Chrome Padded Bubble Envelopes - Peel and Seel

Box of 50 £77.64 INC VAT (£64.70 EX VAT)
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C3 - Manilla Gusset Envelopes - 140gsm - Non Window - Peel and Seal

C3 - Manilla Gusset Envelopes - 140gsm - Non Window - Peel and Seal

Box of 125 £84.76 INC VAT (£70.63 EX VAT)
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Why Choose Express Envelopes?

Express Envelopes are a premier online retailer of envelopes and copier paper with a huge range of over 1000 stock items. Order before 2pm you'll have it the next business day (excludes small packs and samples) , it's as simple as that.
Low Prices
Next Day Delivery
Large Stock

Express Envelopes is rated 4.80 stars by Reviews.co.uk based on 56 merchant reviews

4.80 / 5 Rating
56 Reviews
There was a delay in receiving the envelopes from Express, but once I phoned and spoke to the lovely lady, she helped me out. In fact, the carrier had delivered them to the wrong address but the lady at express sorted it all out for me. Thank you Marie!
Very good quality self-seal product - delivered before 10.30 am the next day. excellent service, Thanks, David
I had a last minute invitation to send out. Express Envelopes had the right envelope for the job and they arrived next day. Perfect.