Typically, Standard Mail delivery takes 10 to 14 days. Standard Mail is a special classification the U.S. Postal Service offers to businesses and organizations that need to mail many identical letters, catalogs or publications not requiring quick delivery.
Although postage per piece is lower than First-Class mail, standard-rate mailings require an annual fee and must be prepared according to strict guidelines to relieve postal workers of sorting time and labor. Mailers must sort the addresses in each mailing according to postal routing order. Each mailing must contain at least 200 identical pieces, with no personal messages or individual enclosures. Postal employees attend to Standard Mail after the First-Class and Priority letters and packages are delivered.