usps first-class mail price

usps first-class mail price varies depending on weight, dimensions, and destination. As of 2025, a standard one-ounce letter costs around $0.68 domestically, with each additional ounce adding to the total. First-Class Package Service for small parcels starts higher but remains affordable for lightweight shipments. This class includes tracking and is ideal for personal mail and small e-commerce orders. Using USPS pricing calculators ensures accurate cost estimation and efficient budget planning for frequent shippers.