usps 1st class international rates are among the most cost-effective shipping options available for small, lightweight packages sent from the United States to other countries. These rates are ideal for eCommerce sellers and individuals shipping items under four pounds. USPS First Class Package International Service offers delivery to over 180 countries, with delivery times that typically range from 7 to 21 business days, depending on the destination and customs clearance. The cost of shipping is calculated based on weight and destination country, with no flat-rate options available for this service. Tracking capabilities vary by country, with some providing full tracking and others offering limited visibility once the package leaves the United States. While the service does not include insurance by default, optional add-ons are available. Understanding USPS 1st Class International rates helps businesses maintain competitive pricing and customer satisfaction by offering affordable international shipping options for low-value items.