post office first class

post office first class refers to USPS First-Class Mail, a popular service for sending lightweight letters, postcards, and parcels under 13 ounces. It’s cost-effective and generally delivers within 1–5 business days across the U.S. For small packages, First-Class Package Service is available and includes tracking. This service is ideal for businesses sending non-urgent items such as clothing, accessories, or documents. The price depends on weight and destination. Using First-Class can help businesses save on shipping while still providing acceptable delivery speed and customer satisfaction.