usps first class mail vs priority mail

usps first class mail vs priority mail remains a common comparison for online sellers and shoppers who seek cost-effective and timely shipping options. First Class Mail is generally suited for lightweight packages under 16 oz, offering lower prices but with slightly longer delivery times. In contrast, Priority Mail handles packages up to 70 lbs and delivers faster, often within 1-3 business days. Choosing between them depends on the package weight, urgency, and value. For eCommerce sellers, especially those running low-cost platforms, knowing which option fits each shipment can significantly impact profitability and customer satisfaction. Understanding the differences ensures better logistics planning and enhances your fulfillment efficiency.