World of Envelopes 
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Envelopes sizes – Whether you are posting a small greeting card or an A4 document we have the right envelope size for you at World of Envelopes

At World of Envelopes there is one quality we are confident we excel at in comparison to all of the other companies who sell postal and packaging products today, and this is choice. We believe that we boast more diversity than anyone else in the industry. This is reflected no better than by the wealth of different envelopes sizes we have available. It doesn’t matter whether you are posting a greeting card, a letter, a cheque or a postcard; we have the right sized envelope for you here. When you need Envelope or the best Envelopes we can help.

We stock the majority of the International Standard envelopes sizes. The ones we have available on site are:

  • DL envelopes – The dimensions of this envelope are as follows; 110 mm x 220 mm. This is the equivalent of an A3 piece of paper folded into thirds.
  • C7 envelopes – This is the smallest envelope out of the ‘C’ format. It is of 81 mm x 114 mm in size.
  • C6 envelopes – A C6 envelope is one that boasts the following dimensions; 114 mm x 162 mm. This is the equivalent of a piece of A4 paper which has been folded in half twice.
  • C5 envelopes – A C5 envelope is one that houses an A5 piece of paper i.e. A4 folded in half once. Thus, the dimensions are as follows; 162 mm x 229 mm.
  • C4 envelopes – As you may have gathered; a C4 envelope is one which is the same size as an A4 piece of paper. Therefore, it is 229 mm x 324 mm.
  • C3 envelopes – Finally, the other internationally recognised standard envelope we stock is a C3 envelope. The dimensions of this are 324 mm x 458 mm. It is the largest of the group.

Nevertheless, these six envelopes sizes are not the only ones we have available. We also stock a huge selection of different sized square envelopes. And if that wasn’t enough we do have a random selection of other sizes which are not featured in the table of international standardly defined envelopes sizes. When you take all of this into account it is quite easy to see how you will definitely find the right envelope for you at World of Envelopes.

In fact, this diversification is not only something that is represented via our extensive selection of envelopes sizes. We also give you a lot of choice when it comes to other attributes. You have a whole host of different colours to pick from. We have a varied selection of textured envelopes too. You can then choose from different types of seals. And that is without even mentioning the choice of a plain envelope or one which boasts a window. There is no way you won’t be able to find the perfect envelope for you.

However, if you are struggling, then please allow one of our experienced and friendly professionals to give you a helping hand. They are always more than happy to point you in the right direction. Simply call World of Envelopes on the following telephone number; +44 (0) 1628 810 000. Please be aware of the fact that our sales support line is only reachable from Monday to Friday between the hours of 8.00 am and 5.30 pm. Nevertheless, this is not the only way to get in touch. You can also drop us an email at We will aim to get back to you as soon as possible with the answers you are looking for.

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