How much does it cost to ship a small box? Use our postage rate calculator to find your most cost effective options. Otherwise, Priority Mail® is just the name of the service class, and you can use any box or packaging that you'd like and for most cases, it's actually cheaper to use your own packaging instead of a Flat Rate service. Is it cheaper to use your own box for priority Mail? This will spread the weight of your cargo over two smaller parcels, which can significantly reduce your shipping costs especially if the large box would qualify for large or oversized pricing. If possible, it's often better to ship two smaller boxes rather than one large, heavy box. Is it cheaper to send 2 small boxes or one big box?
Priority Mail pieces that exceed one cubic foot, are subject to "dimensional weight pricing". For Priority Mail, the price is a combination of weight, size, and how far the mailpiece is traveling. USPS Priority Mail Does USPS charge by weight or size?įor First-Class Mail, shape and weight will determine the price. What is the cheapest method to ship a package? On the other hand, USPS Flat Rate uses only the package size to calculate the shipping cost.2 USPS Priority mail uses the dimensional weight and shipping distance to calculate the shipping cost. The main difference between USPS Priority Mail and USPS Flat Rate is the way the shipping cost is calculated. What is the difference between Priority Mail and Priority flat rate?