What are the size and weight requirements for the different postal classifications?
Solution: Requirements for First-Class Mail card rates -Rectangular -At least 3-1/2 inches high X 5 inches long X 0.007 inch thick -No more than 4-1/4 inches high X 6 inches long X 0.016 inch thick -Length is the dimension parallel to the address. -Oversized cards can be mailed at letter rates. Requirements for First-Class letter rates -Rectangular -At least 3-1/2 inches high X 5 inches long X .007 inch thick -No more than 6-1/8 inches high X 11-1/2 inches long X 1/4 inch thick -A surcharge applies to certain items including square, rigid, and unusually shaped envelopes weighing 1 ounce or less. -Length is the dimension parallel to the address. Requirements for First-Class large envelope rates -Large envelopes exceed any one of the maximum dimensions of a letter. The letter dimensions are 6 1/8 inches high by 11 1/2 inches long by 1/4 inch thick. -The maximum size of a large envelope is 12 inches high by 15 inches long by 3/4 inches thick. -A surcharge applies to pieces weighing 1 ounc
