Maximum Number of Sheets

We can fit up to 14 sheets of paper inside our certified mail envelopes.  If you have a document(s) totaling over 14 sheets of paper then you can send that out through our parent website, LetterStream, using the "Express Flat (Certified)" option.

Please keep in mind that the maximum number of sheets that can be sent via Certified mail is 75 sheets of standard sized, 20lb. paper.