USPS Flat Rate Shipping Large Boxes

Types of Services available

With USPS flat rate shipping, you get fixed postage rates, as long as your package fits inside one of the company’s standard boxes. USPS Flat Rate Boxes come in various sizes, from tiny to very spacious. First, we’ll tell you about the "large box," the biggest one USPS has to offer.

The Size of a USPS Large Box

On the inside, the USPS large box measures 12′′ x 12′′ x 5 1/2′′. That’s quite roomy for a shipping box, so you could easily send or receive an entire desktop PC or a bunch of books. In terms of weight, anything up to 70 lbs is fair game. These dimensions give you ample freedom of choice when it comes to the items you want to ship.

Compared to the large box, the USPS Flat Rate Boxes Small are tiny and can only fit something like a couple of DVDs or a thin book. 

Note that flat rate boxes all ship using USPS priority mail service, offering quick delivery times. As a result, you can expect delivery in one to three business days. If you’re sending a package, you’ll be happy to hear that flat-rate shipping offers free pickup service at your home or office.

Pricing and Conclusion

USPS flat rate shipping large boxes offer a practical and straightforward way to ship large packages quickly. In addition, the flat rate price guarantees that you’re not charged with increased costs for the size and weight of your package. If you are unsure, try a USPS Shipping Calculator. It will show you the exact shipping cost once you enter the measurements of your package.