postal first class rates are the cost associated with sending items via USPS’s First-Class Mail service. When users search for “postal first class rates,” they are looking for information about the pricing structure for sending letters, postcards, and small packages through First-Class Mail. USPS offers First-Class Mail as an affordable and fast shipping option for lightweight items, with rates starting at $0.66 for a single-piece letter weighing up to 1 ounce. For packages, the cost increases based on weight and size, with a maximum weight limit of 13 ounces. First-Class Mail provides delivery within 1 to 5 business days, depending on the destination. It is an ideal choice for sending non-urgent, low-weight items that don’t require expedited service. For individuals and small businesses looking for an affordable and reliable mailing solution, First-Class Mail rates offer an economical option.