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Flat Rate Boxes: Sizes, Prices, and Benefits

May 3, 2019
Author: Caroline McManus

As part of our effort to make sure our customers get the best deals on shipping, we are talking about some of our favorite cost-saving services. I can say with confidence that flat rate shipping tops our list! USPS flat rate boxes and envelopes are boxes with flat shipping postage rates—no matter how heavy the package! If you are shipping small, heavy items, flat rate is the best deal out there. 

What Are USPS® Flat Rate Boxes?

Flat Rate Boxes charge one flat rate no matter what you are shipping..."If it fits, it ships!" Using flat rate shipping options can save your business as much as 50% on shipping costs compared to the other major carriers' rates. Flat rate boxes are available for two USPS services: Priority Mail and Priority Mail Express. Priority Mail is a 1, 2, or 3-day service and Priority Mail Express is a guaranteed overnight delivery service. 

Where Can I Get Flat Rate Boxes? 

Flat rate boxes can be picked up at your local Post Office or ordered online—both for $0! If you have the boxes readily available your employees and colleagues are more likely to use them. Convenience is key! 

  • Your local Post Office
  • USPS online website

What Services Have Flat Rate Shipping? 

It would be great if flat rates were available for all our favorite USPS shipping services but for now, it is available only for Priority Mail and Priority Mail Express.  

What Are the Different Envelope and Box Options? 

There are eight different flat rate envelope and box options. Be sure to pick the option that best fits your item, you don't want extra space in the box because it can cause your item to break or become damaged and the larger the flat rate box the more expensive it is! 

  • Small Flat Rate Box 
  • Medium Flat Rate Box
  • Large Flat Rate Box
  • APO/FPO Large Box
  • Flat Rate Envelope
  • Legal Flat Rate Envelope
  • Padded Flat Rate Envelope

What are the Flat Rate Sizes and Prices? 

Priority Mail and Priority Mail Express offer eight different sized options, and they all handle a maximum weight of up to 70 lbs. See the full chart below for all the sizes and prices. 

Now That You Are A Flat Rate Shipping Expert...

...learn how you can save even more and get discounted rates on all your shipping using NeoShip! Businesses that use shipping software like NeoShip with their postage meter can get these discounts through Commercial Based Pricing. Speak to your sales representative or visit sign up now to add it to your postage meter. 



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