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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 £12.00 INC VAT (£10.00 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 £14.35 £12.72 INC VAT (£10.60 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 £12.83 INC VAT (£10.69 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 £13.80 INC VAT (£11.50 EX VAT)
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130 x 130mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

130 x 130mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

Box of 500 £15.96 INC VAT (£13.30 EX VAT)
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120 x 120mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

120 x 120mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £16.50 INC VAT (£13.75 EX VAT)
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140 x 140mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

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

Box of 500 £17.10 INC VAT (£14.25 EX VAT)
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240 x 240mm -  White Mailing Envelopes - 100gsm - Non Window - Gummed

240 x 240mm - White Mailing Envelopes - 100gsm - Non Window - Gummed

Box of 250 £18.64 INC VAT (£15.53 EX VAT)
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155 x 155mm - White Invitation Envelopes - 90gsm - Non Window - Gummed

155 x 155mm - White Invitation Envelopes - 90gsm - Non Window - Gummed

Box of 500 £19.14 INC VAT (£15.95 EX VAT)
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165 x 165mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

165 x 165mm - White Invitation Envelopes - 100gsm - Non Window - Gummed

Box of 500 £20.26 INC VAT (£16.88 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 £20.52 INC VAT (£17.10 EX VAT)
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155 x 155mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

155 x 155mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

Box of 500 £20.76 INC VAT (£17.30 EX VAT)
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220 x 220mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

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

Box of 250 £20.88 INC VAT (£17.40 EX VAT)
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165 x 165mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

165 x 165mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

Box of 500 £21.24 INC VAT (£17.70 EX VAT)
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140 x 140mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

140 x 140mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

Box of 500 £21.52 INC VAT (£17.93 EX VAT)
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170 x 170mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

170 x 170mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £21.88 INC VAT (£18.23 EX VAT)
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165 x 165mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

165 x 165mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £22.08 INC VAT (£18.40 EX VAT)
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155 x 155mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

155 x 155mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £22.08 INC VAT (£18.40 EX VAT)
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170 x 170mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

170 x 170mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

Box of 500 £22.14 INC VAT (£18.45 EX VAT)
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220 x 220mm - White Mailng Envelopes - 100gsm - Non Window - Gummed

220 x 220mm - White Mailng Envelopes - 100gsm - Non Window - Gummed

Box of 500 £22.56 INC VAT (£18.80 EX VAT)
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240 x 240mm -  White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

240 x 240mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

Box of 250 £22.56 INC VAT (£18.80 EX VAT)
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111 x 111 - White Invitation Envelopes - 90gsm - Non Window - Gummed

111 x 111 - White Invitation Envelopes - 90gsm - Non Window - Gummed

Box of 1000 £23.88 INC VAT (£19.90 EX VAT)
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220 x 220mm - White Mailing Envelopes - 100gsm - Window - Gummed

220 x 220mm - White Mailing Envelopes - 100gsm - Window - Gummed

Box of 500 £24.00 INC VAT (£20.00 EX VAT)
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165x165mm - CD Emerald Green Padded Bubble Envelopes - Peel and Seal

165x165mm - CD Emerald Green Padded Bubble Envelopes - Peel and Seal

Box of 100 £27.17 £24.50 INC VAT (£20.42 EX VAT)
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165×165mm - CD Festive Red Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Festive Red Padded Bubble Envelopes - Peel and Seal

Box of 100 £27.17 £24.50 INC VAT (£20.42 EX VAT)
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165×165mm - CD Silver Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Silver Padded Bubble Envelopes - Peel and Seal

Box of 100 £27.17 £24.50 INC VAT (£20.42 EX VAT)
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190 x 190mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

190 x 190mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £26.94 INC VAT (£22.45 EX VAT)
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190 x 190mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

190 x 190mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

Box of 500 £27.06 INC VAT (£22.55 EX VAT)
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200 x 200mm - White Commercial Envelopes - 100gsm - Non Window - Peel and Seal

200 x 200mm - White Commercial Envelopes - 100gsm - Non Window - Peel and Seal

Box of 500 £27.66 INC VAT (£23.05 EX VAT)
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155 x 155mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

155 x 155mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

Box of 500 £28.14 INC VAT (£23.45 EX VAT)
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195 x 195mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

195 x 195mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £28.42 INC VAT (£23.68 EX VAT)
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240 x 240mm -  White Commercial Envelopes - 100gsm - Window - Gummed

240 x 240mm - White Commercial Envelopes - 100gsm - Window - Gummed

Box of 250 £28.48 INC VAT (£23.73 EX VAT)
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165 x 165mm - Ultra White Square Envelopes - 120gsm - Non Window - Peel & Seal

165 x 165mm - Ultra White Square Envelopes - 120gsm - Non Window - Peel & Seal

Box of 500 £28.72 INC VAT (£23.93 EX VAT)
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205 x 205mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

205 x 205mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 500 £28.90 INC VAT (£24.08 EX VAT)
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165×165mm - CD Seal Oil Black Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Seal Oil Black Padded Bubble Envelopes - Peel and Seal

Box of 100 £27.17 £29.00 INC VAT (£24.17 EX VAT)
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165×165mm - CD Peacock Blue Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Peacock Blue Padded Bubble Envelopes - Peel and Seal

Box of 100 £27.17 £29.00 INC VAT (£24.17 EX VAT)
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165×165mm - CD Brushed Chrome Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Brushed Chrome Padded Bubble Envelopes - Peel and Seal

Box of 100 £29.90 £29.00 INC VAT (£24.17 EX VAT)
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165×165mm - CD Glamour Gold Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Glamour Gold Padded Bubble Envelopes - Peel and Seal

Box of 100 £27.17 £29.00 INC VAT (£24.17 EX VAT)
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155×155mm - Ice White Square Envelopes - 120gsm - Non Window - Peel and Seal

155×155mm - Ice White Square Envelopes - 120gsm - Non Window - Peel and Seal

Box of 500 £29.28 INC VAT (£24.40 EX VAT)
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240 x 240mm-  Ultra White Card Envelopes - 210gsm - Non Window - Peel & Seal

240 x 240mm- Ultra White Card Envelopes - 210gsm - Non Window - Peel & Seal

Box of 125 £29.98 INC VAT (£24.98 EX VAT)
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140 x 140mm - White Commercial Envelopes - 100gsm - Window - Gummed

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

Box of 500 £31.20 INC VAT (£26.00 EX VAT)
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300 x 300mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

300 x 300mm - White Commercial Envelopes - 100gsm - Non Window - Gummed

Box of 250 £31.92 INC VAT (£26.60 EX VAT)
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220×220mm - Ice White Square Envelopes - 120gsm - Non Window - Peel and Seal

220×220mm - Ice White Square Envelopes - 120gsm - Non Window - Peel and Seal

Box of 250 £32.12 INC VAT (£26.77 EX VAT)
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165×165mm - CD Party Pink Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Party Pink Padded Bubble Envelopes - Peel and Seal

Box of 100 £32.60 INC VAT (£27.17 EX VAT)
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165×165mm - CD Purple Grape Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Purple Grape Padded Bubble Envelopes - Peel and Seal

Box of 100 £32.60 INC VAT (£27.17 EX VAT)
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146 x 146mm - White Invitation Envelopes - 90gsm - Non Window - Gummed

146 x 146mm - White Invitation Envelopes - 90gsm - Non Window - Gummed

Box of 1000 £33.00 INC VAT (£27.50 EX VAT)
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125x125mm - Commercial White CD Envelopes - 90gsm - Window - Gummed

125x125mm - Commercial White CD Envelopes - 90gsm - Window - Gummed

Box of 1000 £33.72 INC VAT (£28.10 EX VAT)
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240 x 240mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

240 x 240mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

Box of 250 £33.76 INC VAT (£28.13 EX VAT)
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205 x 205mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

205 x 205mm - White Commercial Envelopes - 100gsm - Non Window - Peel & Seal

Box of 500 £34.14 INC VAT (£28.45 EX VAT)
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155 x 155mm - White Commercial Envelopes - 100gsm - Window - Gummed

155 x 155mm - White Commercial Envelopes - 100gsm - Window - Gummed

Box of 500 £34.90 INC VAT (£29.08 EX VAT)
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165 x 165mm - White Commercial Envelopes - 100gsm - Window - Gummed

165 x 165mm - White Commercial Envelopes - 100gsm - Window - Gummed

Box of 500 £35.38 INC VAT (£29.48 EX VAT)
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165×165mm - CD Neon Blue Padded Bubble Envelopes - Peel and Seal

165×165mm - CD Neon Blue Padded Bubble Envelopes - Peel and Seal

Box of 100 £35.88 INC VAT (£29.90 EX VAT)
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165×165mm - CD Chilli Haze Padded Bubble Envelpes - Peel and Seal

165×165mm - CD Chilli Haze Padded Bubble Envelpes - Peel and Seal

Box of 100 £35.88 INC VAT (£29.90 EX VAT)
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160x160mm - Banana Yellow Envelopes - 120gsm - Non Window - Peel and Seel

160x160mm - Banana Yellow Envelopes - 120gsm - Non Window - Peel and Seel

Box of 500 £36.29 INC VAT (£30.24 EX VAT)
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170 x 170mm - White Commercial Envelopes - 100gsm - Window - Gummed

170 x 170mm - White Commercial Envelopes - 100gsm - Window - Gummed

Box of 500 £36.40 INC VAT (£30.33 EX VAT)
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160x160mm - Clotted Cream Envelopes - 120gsm - Non Window - Peel and Seal

160x160mm - Clotted Cream Envelopes - 120gsm - Non Window - Peel and Seal

Box of 500 £37.14 INC VAT (£30.95 EX VAT)
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190 x 190mm - White Commercial Envelopes - 100gsm - Window - Gummed

190 x 190mm - White Commercial Envelopes - 100gsm - Window - Gummed

Box of 500 £38.64 INC VAT (£32.20 EX VAT)
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270 x 270mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

270 x 270mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

Box of 250 £39.76 INC VAT (£33.13 EX VAT)
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160×160mm - Pillar Box Red Envelopes - 120gsm - Non Window - Peel and Seal

160×160mm - Pillar Box Red Envelopes - 120gsm - Non Window - Peel and Seal

Box of 500 £41.46 INC VAT (£34.55 EX VAT)
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160×160mm - Avocado Green Envelopes - 120gsm - Non Window - Peel and Seal

160×160mm - Avocado Green Envelopes - 120gsm - Non Window - Peel and Seal

Box of 500 £41.46 INC VAT (£34.55 EX VAT)
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160×160mm - Caribbean Blue Envelopes - 120gsm - Non Window - Peel and Seal

160×160mm - Caribbean Blue Envelopes - 120gsm - Non Window - Peel and Seal

Box of 500 £41.46 INC VAT (£34.55 EX VAT)
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160×160mm - Baby Pink Envelopes - 120gsm - Non Window - Peel and Seal

160×160mm - Baby Pink Envelopes - 120gsm - Non Window - Peel and Seal

Box of 500 £41.46 INC VAT (£34.55 EX VAT)
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220×220mm - Banana Yellow Envelopes - 120gsm - Non Window - Peel and Seal

220×220mm - Banana Yellow Envelopes - 120gsm - Non Window - Peel and Seal

Box of 250 £43.12 INC VAT (£35.93 EX VAT)
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220 x 220mm - Pumpkin Orange Envelopes - 120gsm - Non Window - Peel and Seal

220 x 220mm - Pumpkin Orange Envelopes - 120gsm - Non Window - Peel and Seal

Box of 250 £43.12 INC VAT (£35.93 EX VAT)
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220×220mm - Pillar Box Red Envelopes - 120gsm - Non Window - Peel and Seal

220×220mm - Pillar Box Red Envelopes - 120gsm - Non Window - Peel and Seal

Box of 250 £43.12 INC VAT (£35.93 EX VAT)
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220x220mm - Avocado Green Envelopes - 120gsm - Non Window - Peel and Seal

220x220mm - Avocado Green Envelopes - 120gsm - Non Window - Peel and Seal

Box of 250 £43.12 INC VAT (£35.93 EX VAT)
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 220×220mm - Caribbean Blue Envelopes - 120gsm - Non Window - Peel and Seal

220×220mm - Caribbean Blue Envelopes - 120gsm - Non Window - Peel and Seal

Box of 250 £43.12 INC VAT (£35.93 EX VAT)
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165 x 165mm - Ultra White Card Envelopes - 210gsm - Peel and Seal

165 x 165mm - Ultra White Card Envelopes - 210gsm - Peel and Seal

Box of 250 £44.64 INC VAT (£37.20 EX VAT)
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165×165mm - CD Metallic Black Foil Envelopes - 70µm - Peel and Seal

165×165mm - CD Metallic Black Foil Envelopes - 70µm - Peel and Seal

Box of 250 £45.66 INC VAT (£38.05 EX VAT)
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300 x 300mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

300 x 300mm - Ultra White Wove Envelopes - 120gsm - Non Window - Peel & Seal

Box of 250 £47.11 INC VAT (£39.26 EX VAT)
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330 x 330mm - White Commercial Envelopes - 120gsm - Non Window - Peel & Seal

330 x 330mm - White Commercial Envelopes - 120gsm - Non Window - Peel & Seal

Box of 250 £53.51 INC VAT (£44.59 EX VAT)
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220 x 220mm - Ultra White Card Envelopes - 210gsm - Non Window - Peel & Seal

220 x 220mm - Ultra White Card Envelopes - 210gsm - Non Window - Peel & Seal

Box of 250 £53.64 INC VAT (£44.70 EX VAT)
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220 x 220mm -  Oxford Blue Envelopes - 120gsm - Non Window - Peel & Seal

220 x 220mm - Oxford Blue Envelopes - 120gsm - Non Window - Peel & Seal

Box of 250 £57.12 INC VAT (£47.60 EX VAT)
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230×230mm - Seal Oil Black Padded Bubble Envelopes - Peel and Seal

230×230mm - Seal Oil Black Padded Bubble Envelopes - Peel and Seal

Box of 100 £62.34 INC VAT (£51.95 EX VAT)
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160 x 160mm - Jet Black Envelopes - 120gsm - Non Window - Peel & Seal

160 x 160mm - Jet Black Envelopes - 120gsm - Non Window - Peel & Seal

Box of 500 £69.78 INC VAT (£58.15 EX VAT)
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160 x 160mm - Translucent White Envelopes - 100gsm - Non Window - Peel & Seal

160 x 160mm - Translucent White Envelopes - 100gsm - Non Window - Peel & Seal

Box of 250 £71.56 INC VAT (£59.63 EX VAT)
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160 x 160mm - Metallic Silver Envelopes - 130gsm - Non Window - Peel & Seal

160 x 160mm - Metallic Silver Envelopes - 130gsm - Non Window - Peel & Seal

Box of 500 £76.14 INC VAT (£63.45 EX VAT)
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160 x 160mm - Metallic Gold Envelopes - 130gsm - Non Window - Peel & Seal

160 x 160mm - Metallic Gold Envelopes - 130gsm - Non Window - Peel & Seal

Box of 500 £76.14 INC VAT (£63.45 EX VAT)
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220 x 220mm - Metallic Silver Envelopes - 130gsm - Non Window - Peel & Seal

220 x 220mm - Metallic Silver Envelopes - 130gsm - Non Window - Peel & Seal

Box of 250 £84.60 INC VAT (£70.50 EX VAT)
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220 x 220mm - Metallic Gold Envelopes - 130gsm - Non Window - Peel & Seal

220 x 220mm - Metallic Gold Envelopes - 130gsm - Non Window - Peel & Seal

Box of 250 £84.60 INC VAT (£70.50 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.