Applicability of the New Rules. The new cargo securement rules apply to the same types of vehicles and cargo as the old rules, covering all cargo-carrying commercial motor vehicles (as defined in 49 CFR 390.5) operated in interstate commerce.
Most commercially-produced postcards measure approximately 4.21 inches by 5.47 inches. Less commonly, smaller postcards are typically 3.5 inches by 5.5 inches, close to the minimum size the USPS allows.
Large postcards can measure up to 6 and 1/8â high, 11 Â½â long and Â¼â thick, but they cost as much as a First-Class Letter ($0.485 and up) to send. postcard is a rectangular mailer sent without an envelope. Sending a postcard is an extremely affordable way to communicate when youâre using the U.S Postal Serviceâregular postcards cost only $0.35 to mail!