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Square Envelopes

We are pleased to provide an extensive range of square envelopes, available in multiple sizes, colours and GSM to suit your requirements. 

Our square envelopes are built using the best quality paper and glue available meaning these will inevitably provide the quality you deserve. With an array of colours available also this means your post will stand out from the competition, or even more on brand!

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100×100mm - White Mailing Envelopes - 100gsm - Non Window - Gummed

100×100mm - White Mailing Envelopes - 100gsm - Non Window - Gummed

Box of 500 £17.94 INC VAT (£14.95 EX VAT)
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220x220mm - White Mailing Envelopes - 100gsm - Non Window - Self Seal

220x220mm - White Mailing Envelopes - 100gsm - Non Window - Self Seal

Box of 250 £18.66 INC VAT (£15.55 EX VAT)
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220 x 220mm - White Mailing Envelopes - 100gsm - Non Window - Self Seal

220 x 220mm - White Mailing Envelopes - 100gsm - Non Window - Self Seal

Box of 250 £19.01 INC VAT (£15.84 EX VAT)
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220 x 220mm - White Commercial Envelopes - 100gsm - Window - Self Seal

220 x 220mm - White Commercial Envelopes - 100gsm - Window - Self Seal

Box of 250 £20.23 INC VAT (£16.86 EX VAT)
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130x130mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

130x130mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

Box of 500 £22.96 INC VAT (£19.13 EX VAT)
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120x120mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

120x120mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £23.04 INC VAT (£19.20 EX VAT)
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140x140mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

140x140mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

Box of 500 £24.58 INC VAT (£20.48 EX VAT)
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240x240mm -  White Mailing Envelopes - 100gsm - Non Window - Gummed

240x240mm - White Mailing Envelopes - 100gsm - Non Window - Gummed

Box of 250 £26.32 INC VAT (£21.93 EX VAT)
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155x155mm - White Invitation Envelopes - 90gsm - Non Window - Gummed

155x155mm - White Invitation Envelopes - 90gsm - Non Window - Gummed

Box of 500 £27.46 INC VAT (£22.88 EX VAT)
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140 x 140mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

140 x 140mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £28.92 INC VAT (£24.10 EX VAT)
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165x165mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

165x165mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

Box of 500 £29.52 INC VAT (£24.60 EX VAT)
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220x220mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

220x220mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

Box of 250 £29.83 INC VAT (£24.86 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 4.81 stars by Reviews.co.uk based on 57 merchant reviews

4.81 / 5 Rating
57 Reviews
Ordered from France and delivery only took 2 working days. Envelopes good quality for the price.
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