It currently costs 44 cent to mail a regular envelope, which is the price for a stamp.
depends on the size and weight
The most-accurate answer requires much more information... _Originating country _Destination country _Size/shape envelope _total WEIGHT of filled envelope _level of service (overnight,...
the USPS charges by weight and not by size
The first ounce is 44 cents. Each additional ounce would be 17 cents. That would total $1.97 in postage.