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A Guide to Envelopes

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Envelopes; a basic everyday object used mostly in offices, to post letters, documents or cards. Whilst the art of writing letters as form of communication has taken a back seat in most peoples lives, with texts and emails, in business envelopes are still considered an important office staple.

Although envelopes are a common occurrence, of which we’re all familiar, types and sizes can be a little confusing. So to break down the envelope barrier we’ve listed the most common types of envelope styles and sizes that you’re likely to come across in an office environment.

One of the most basic attributes of an envelope is the window. For those letters with addresses of the correspondent printed on it, a windowed envelope may be the best solution, so that the address can show through.

In regards to envelope size, we’ll be looking at four main types:

C4: This type of envelope is 324 mm by 229 mm in size which is typically A4, meaning that you can place a full unfolded sheet in. These are predominantly used to carry documents that require the need to stay straight, such as brochures and tenders.

C5: Typically 229 mm by 162 mm in size. These envelopes hold an A4 sheet of paper folded once or an A5 sheet unfolded.

C6: This type of envelope is 114 mm by 162 mm and can hold an A5 piece of paper folded once, or an A4 piece of paper folded four times.

DL: This envelope is 110mm by 220mm in size and can hold an A5 sheet folded once. However, the most effective use is for an A4 piece of paper folded twice, as it fills both the height and the width of the envelope.
There are multiple types of envelopes styles, a selection of which can be seen below:

In regards to the type of envelope seal, there seems to be just as many alternatives as there are envelope types and styles. Below are the most common options available:

Gummed: to seal the envelope moisten adhesive flap and press to seal.

Self Seal: simply fold the flap against the back of the envelope and press to seal.

Peel and Seal: remove the strip to reveal an adhesive and press against the back of the envelope to seal.

So, the next time you’re looking for an envelope and are struggling to find what type you need, just refer to this guide. Then once you’ve decided, why not browse our selection.

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