If you would like the flexibility to print all or any part of the envelope, choose printed then made envelopes. They can be printed on either 100gm cartridge or 115gm gloss art paper, and you can specify non-standard sizes and shapes (just askMail Boxes Etc. Cambridge for a quote if your particular requirements are not shown here). The cost of printed then made envelopes is a little higher than pre-made envelopes, but the quality is amazing.
Fast quote request