Envelope and paper size guide





Here at Dudleys Online we stock an extensive range of envelopes and paper and appreciate that sometimes finding what you need can be confusing. To help you choose the correct paper and envelopes for your office needs we have compiled a paper and envelope sizes guide as can be seen below:




UK Envelope sizes / dimensions UK





Standard envelope :


DL  : The standard for business letters and our most popular envelope type. A standard A4 letter can be folded three times into a DL envelope. See our range from just £11.99 here.


C6  : Slightly bigger than standard DL - an A4 sheet can be folded twice into quarters to fit inside a C6. More customary for invitation and informal business correspondence. See our range here. An ideal mail envelope size .


C5  : This size can take an A5 piece of paper with no fold or an A4 piece of paper folded once. We have an extensive range here. Also great in mail envelope sizes .


C4 : A larger envelope, C4 is an ideal size for promotional material and A4 size documents. Useful for formal correspondence and artwork. See our range here.



Types of print envelopes :


We have a range of features for sending different documents. We stock all of the following types:


Plain envelopes : No window so ideal for writing or labelling. Available in all sizes here.


Board back : Complete with a card back as support for important documents that cannot be folded. Available here.


Window  : Our range has windows of various sizes for pre-typed addresses and descriptions. See our envelope range here.


Gusset  : Expandable envelopes which are useful for sending promotional material such as leaflets and catalogues. See our range here.



We also stock an extensive range of more specialist envelopes, including gift, cd and large envelopes. If you cannot find what you need email support@dudleysonline.co.uk

Need a company envelope? Email here



A Paper sizes UK


The key ranges of paper we stock can be seen below:

Most commonly used is A4 size


Type               Size in mm                                                                       Size in inches

A2 420 x 594 16 1/2 x 23 3/8
A3 297 x 420 11 3/4 x 16 1/2
A4 210 x 297 8 1/4 x 11 3/4
A5 148 x 210 5 7/8 x 8 1/4
A6 105 x 148 4 1/8 x 5 7/8



Our most popular are A3, A4 and A5. For more specialist paper and international paper sizes please email support@dudleysonline.co.uk


A2 : The equivalent of four A4 pages. Used for poster and diagrams as well as group brainstorming. Sized 16.5 x 23" or 594mm x 420mm.


A3  : Twice A4 and ideal for graphic work and large scale printing. Often used for presentation display and advertising projects. Sized 11" x 17" or 297mm x 400mm. 


A4 : A common paper size - ideal for office use - invoicing, documenting and writing.

A4 size paper dimensions are 8.5" x 11" or 297mm x 210mm.  

See our cheap A4 paper giveaway here


A5 : Half the size of A4, ideal for notemaking, brochures and flyers. 8.2" x 5.8" or 210mm x 148mm.


A6 : Half the size of A5 and used for postcards and casual notemaking. 5.8" x 4.1" or 148mm x 105mm. This is the same as C6 paper dimensions .




Dudleys online stationers paper range

Search for A3 paper, A4 size , A5 paper size here

Email us at sales@dudleysonline.co.uk



Recycled and green paper and envelopes


If you search our green product range you will find a wide variety of recycled and green envelope and paper files , all types of planner ,  envelopes and paper .

We are committed to sustainable and environmentally friendly stationery and this is reflected in our range of envelopes and a 3 a 4 and a 5 products .


Our environmental paper and envelopes ranges are as follows:


100% recycled

More than 50% recycled

Of environmental benefit

Energy efficient


In partnership with the Forest Stewardship Council




Contribute to a better environment by ordering eco-friendly products . For dimensions and sheet information on our range search here

Cheap Office Supplies from Dudleys Online



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