how much is large flat rate priority box

how much is large flat rate priority box is a common question for those looking to ship items using USPS’s Priority Mail service. The large flat rate box allows customers to ship large items for a fixed price, regardless of the weight (up to 70 lbs) or destination. As of 2025, the cost of a large flat rate box is typically higher than smaller flat rate options, but it can be a cost-effective solution for shipping bulky items. The price varies slightly depending on the exact service and location, so it’s best to check the USPS website for the most current rates.