Viewing post #903650 by UndertheSun

You can't find these boxes at your local post office, you have to order them online (it's free).

If you go to the information link, you'll find links to all of the different sizes of Regional Rate Boxes. You can order them from those links. When you order them, they come in quantities of 10, or 25 boxes.

For longer distances, remember to check the charts. Regional Boxes can quickly add up to more than a Flat Rate box the further the box has to travel.