us postal service first class

us postal service first class mail is a popular and affordable shipping option offered by USPS for sending letters, postcards, and small packages within the U.S. and internationally. First-Class Mail is typically used for lightweight items, weighing up to 13 ounces domestically. It provides fast delivery, usually within 1-3 business days for domestic shipments, and includes tracking and delivery updates for packages. For international shipments, First-Class Mail offers affordable rates but may have longer delivery times, depending on the destination country. It is ideal for non-urgent, cost-effective shipping.