what is first class mail postage

what is first class mail postage refers to the cost of sending letters and lightweight packages through the USPS (United States Postal Service) using its First-Class Mail service. First-Class Mail is the most affordable option for sending small parcels and letters, with delivery times typically ranging from one to five business days, depending on the destination. First-Class Mail postage rates are based on the weight and size of the item being sent. For example, sending a letter in a standard envelope starts at around $0.66, while a small package can cost more, depending on its weight and size.