weight first class mail

weight first class mail refers to the weight limitations for USPS First-Class Mail service, which is designed for sending lightweight items, including letters and small packages. The maximum weight for First-Class Mail is 13 ounces for packages, with no weight limit for letters, as long as they remain within the size requirements. For e-commerce businesses, using First-Class Mail is an affordable and efficient shipping option for sending small and lightweight items. Understanding the weight restrictions for First-Class Mail helps businesses accurately calculate shipping costs and ensure proper service selection.