USPS® Priority Mail Regional Rate® boxes are specific kinds of packaging that you can get from the Post Office's website. To ship with these boxes, you have to buy the specific type of Regional Rate® postage that matches the type of box you're using. You can see learn more and see the rates here.

It's a common misconception that Regional Rate® is a better deal than using your own packaging, but that's only true if you do not have access to Priority Mail Cubic®. Shipping with Regional Rate® is always more expensive than if you used your own similarly-sized box, or a free "mailing box" from USPS®. 

Here's why:

The Priority Mail Regional Rate A Box comes in two sizes:

  • Priority Mail Regional Rate Box A1 Box: 10 x 7 x 5 inches
  • Priority Mail Regional Rate Box A2 Box: 13 x 11 x 2.5 inches

Both of these boxes are just barely bigger than 0.2 cubic feet in volume.

If you used your own box which was *almost* the same size (smaller by even just a tenth of an inch like 10 x 7 x 4.9 inches or 13 x 11 x 2.4 inches), then the boxes would be in the 0.2 cubic feet pricing tier for Priority Mail Cubic®, and would save you anywhere from $0.30 cents to $3.99 on every box you shipped, depending on how far it's going:

Use your own box for a custom size that fits your products, or USPS® offers two free "mailing boxes" that are the cubic 0.2 size:


The Priority Mail Regional Rate B Box comes in two sizes as well: 

  • Priority Mail Regional Rate Box B1 Box: 12.25 x 10.5 x 5.5 inches
  • Priority Mail Regional Rate Box B2 Box: 16.25 x 14.5 x 3 inches 

Both of these are just slightly bigger than 0.4 cubic feet in volume.

If you used your own box that was just slightly smaller (like 12.25 x 10.5 x 5.4 inches or 16.25 x 14.5 x 2.9 inches), then they would be in the 0.4 cubic feet pricing tier of Priority Mail Cubic® and would save you anywhere from $0.10 cents to $9.71, depending on how far you're shipping it:

Use your own box for a custom size that fits your products, or USPS® offers two free "mailing boxes" that are the cubic 0.4 size:

Did this answer your question?