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Envelopes by Size

We have nearly all envelopes sizes right here! Including A3, A4, B4, B6, C3, C4, C5, C6, DL and Square Envelopes. We have oversized, undersized and gusset variants of each size of envelope. Within each size category we have a huge range of mailing and office suitable envelopes, including inkjetable ones. Also we have many different colours, just find the required size and browse through thousands of envelopes! If you still cant find the one you are looking for try the advanced search above or give us a ring we are more than happy to help! - Call Us Here

Not sure of the type you require? Try our handy envelope size guide.

E4 Gusset (280x400x50mm)

E4 Gusset (280x400x50mm)

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B4 Envelopes (250x352mm)

B4 Envelopes (250x352mm)

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B4 Gusset (352×250×25mm)

B4 Gusset (352×250×25mm)

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B4 Gusset (352×250×50mm)

B4 Gusset (352×250×50mm)

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B6 Envelopes (125×176mm)

B6 Envelopes (125×176mm)

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C2 Envelopes  (444×625mm)

C2 Envelopes (444×625mm)

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C3 Envelopes (324x450mm)

C3 Envelopes (324x450mm)

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C3 Gusset (450×324x30mm)

C3 Gusset (450×324x30mm)

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C3+ Envelopes (330x430MM)

C3+ Envelopes (330x430MM)

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C4 Envelopes (229x324mm)

C4 Envelopes (229x324mm)

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C4 Envelopes (230x324mm)

C4 Envelopes (230x324mm)

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C4 Gusset (229x324x25mm)

C4 Gusset (229x324x25mm)

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C4 Gusset  (229x324x50mm)

C4 Gusset (229x324x50mm)

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C5 Envelopes (162x229mm)

C5 Envelopes (162x229mm)

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C5+ Envelopes (235x162mm)

C5+ Envelopes (235x162mm)

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C5++Envelopes (162x238mm)

C5++Envelopes (162x238mm)

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C5 Gusset(162×229x25mm)

C5 Gusset(162×229x25mm)

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C6 Envelopes (114x162mm)

C6 Envelopes (114x162mm)

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DL BRE (102 × 216mm)

DL BRE (102 × 216mm)

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DL Envelopes (110x220mm)

DL Envelopes (110x220mm)

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Dl+ Envelopes (114x229mm)

Dl+ Envelopes (114x229mm)

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DL++ Envelopes(114x235mm)

DL++ Envelopes(114x235mm)

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Other Envelopes

Other Envelopes

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A3 Envelopes (420x297mm)

A3 Envelopes (420x297mm)

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A3+ Envelopes (250×350mm

A3+ Envelopes (250×350mm

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Square (100mm) Envelopes

Square (100mm) Envelopes

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Square (111mm) Envelopes

Square (111mm) Envelopes

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Square (120mm) Envelopes

Square (120mm) Envelopes

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Square (125mm) Envelopes

Square (125mm) Envelopes

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Square (130mm) Envelopes

Square (130mm) Envelopes

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Square (140mm) Envelopes

Square (140mm) Envelopes

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Square (146mm) Envelopes

Square (146mm) Envelopes

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Square (155mm) Envelopes

Square (155mm) Envelopes

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Square (160mm) Envelopes

Square (160mm) Envelopes

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Square (164mm) Envelopes

Square (164mm) Envelopes

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Square (165mm) Envelopes

Square (165mm) Envelopes

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Square (170mm) Envelopes

Square (170mm) Envelopes

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Square (190mm) Envelopes

Square (190mm) Envelopes

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Square (195mm) Envelopes

Square (195mm) Envelopes

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Square (200mm) Envelopes

Square (200mm) Envelopes

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Square (205mm) Envelopes

Square (205mm) Envelopes

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Square (220mm) Envelopes

Square (220mm) Envelopes

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Square (230mm) Envelopes

Square (230mm) Envelopes

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Square (240mm) Envelopes

Square (240mm) Envelopes

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Square (249mm) Envelopes

Square (249mm) Envelopes

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Square (270mm) Envelopes

Square (270mm) Envelopes

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Square (300mm) Envelopes

Square (300mm) Envelopes

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Square (330mm) Envelopes

Square (330mm) Envelopes

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Square (340mm) Envelopes

Square (340mm) Envelopes

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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