How much does it cost to mail a large envelope with ten sheets of paper?

The most-accurate answer requires much more information... _Originating country _Destination country _Size/shape envelope _total WEIGHT of filled envelope _level of service (overnight, 2nd-day, whenever) etc. In the USA, this can cost from about $1, to about $20. Assuming this is a USA question, the USPS provides an easy-to-use rate calculator at: http://postcalc.usps.gov/ (or see "Related Link", below.) Hint: You'll need to have the information (above) ready.