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.
A: All standard postcard sizes, from 4â x 6â up to 6â x 11â (flat or folded to size), can be mailed. Sizes should fit within the requirements of the United States Postal Service (USPS). Q: What are the postage rates that apply to mailed postcards? A: Rates will vary depending on the postcard size of your choice. For example, a 4â x 6â and 4.25â x 6â sized postcard can qualify for First Class Card rate. Meanwhile, 4.5â x 6â up to 6â x 11â postcards, whether flat or folded, qualify for either First Class Letter rate or Standard Bulk rate. Check out our postcard pageâs mailing tab for more details.