usps ground advantage dimensions refer to the size limitations for USPS Ground Advantage service, which is a more affordable shipping option for larger and heavier packages. The maximum weight for Ground Advantage packages is typically up to 70 pounds, with dimensions that do not exceed 108 inches in combined length and girth (length + 2x width + 2x height). This service provides a balance between affordability and reliable delivery, with transit times that can range from 2 to 8 business days, depending on the destination.