Standard Mail (A)
Standard Mail matter that weighs less than 16 ounces. It comprises the subclasses of Regular Standard Mail, Nonprofit Standard Mail, Enhanced Carrier Route Standard Mail, Nonprofit Enhanced Carrier Route Standard Mail, and Single-Piece Standard Mail. These subclasses include circulars, printed matter, pamphlets, catalogs, newsletters, direct mail, and merchandise. Standard Mail (A) may be sent at presorted rates and at automation rates.