international first class postage is a shipping service offered by USPS for sending small and lightweight parcels to international destinations at an affordable rate. First-Class Mail International is designed for items weighing up to 4 pounds and is ideal for sending documents, gifts, and small products overseas. USPS offers First-Class Mail International at a lower cost compared to other international shipping services, making it an attractive option for businesses and individuals looking to ship internationally on a budget. Delivery times for First-Class Mail International can range from 7 to 21 business days, depending on the destination country. Tracking services are available for some international shipments, and USPS provides customs forms for international shipments to ensure that packages clear customs smoothly. Although First-Class Mail International is an economical option, it is important to be aware of potential customs fees and the longer delivery times compared to more expedited international services.