The number of stamps needed for a manila envelope is determined by the size, weight and destination of the envelope. Once these details are calculated, the sender can type the information into the USPS online postage price calculator and choose one of the postal services, the prices of which vary based on speed and security.Continue Reading
For mailing purposes, a manila envelope is classified as a letter, large envelope or package based on its size. As of 2014, a letter is a minimum of 3 1/2 inches by 5 inches and a maximum 6 1/8 inches by 11 1/2 inches. A letter also must be no more than 1/4 inch thick. A large envelope is a minimum of 6 1/8 inches by 11 1/2 inches and a maximum of 12 inches by 15 inches. A large envelope can be no more than 3/4 inch thick. If a manila envelope exceeds the dimensions of a large envelope, it is classified as a package. Sending a manila envelope to an international destination is more expensive than sending it to a domestic destination.
Manila envelopes classified as letters or large envelopes can be sent by Priority Mail Express, Priority Mail or First-Class Mail. If the manila envelope is large enough to be a package, it can also be sent by the less expensive but slower service of Standard Post. If it contains books, manuscripts, sound recordings or educational materials without advertising, it can be sent by Media Mail, formerly known as Book Rate. Priority Mail Express is a money-back guaranteed service that includes tracking and insurance up to $100, as of 2014. For additional fees, extra services can be added, such as more insurance, USPS tracking for items other than those shipped with Priority Mail Express, signature confirmation, and certified or registered mail.Learn more about Postal Services