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.
The typical business card size in the US is 3.5 inches by 2 inches. Most of the templates you find in desktop publishing or business card software and the free business card templates on the Web are designed for 3.5 x 2-inch business cards. They can be horizontal (landscape) (3.5 inches wide or long and 2 inches tall) or vertical (portrait) (3.5 inches tall and 2 inches wide).