2024 Postage Rates By Weight And Height. Postage rates for local mail (letters and packets), air mail (letters and packets) and surface mail (letters and packets) is set by reference to the mail format, namely small. The higher weight is used to calculate the.
Explore the usps postage rate shifts for postcards, flats, and letter sizes in 2024, and. The formula for working out the girth of your parcel is: