weight of 1st class postage

weight of 1st class postage is an important consideration when calculating shipping costs for USPS First-Class Mail. The weight of a package determines the postage rate, with heavier packages incurring higher charges. For First-Class Mail, the maximum weight limit is 13 ounces for letters and 15.99 ounces for packages. The postage cost is typically based on weight, with rates starting at $0.66 for a 1-ounce letter. As the weight increases, the price per ounce also increases, up to the maximum weight limit for First-Class Mail packages.