Octopus stock a selection of internal mail envelopes for sending letters and files through a company internal mail network. Orange internal mail envelopes come in several sizes, but C4 is the most popular.
The C4 internal mail envelope is 324x229mm and has a grid printed on the front so that you can fill in each box each time the envelope is used.
Next day delivery is available all over the UK. Same day delivery is possible in Greater Manchester and Cheshire from our Stockport warehouse.