Shipping with Flat Rate Boxes is a breeze. As long as it will fit in the box, it will ship at the same price whenever possible. The boxes are provided by USPS for free, and if your shipment is going ...
Retail consumers – that is, people using USPS to ship their own items – may most directly notice the increase of $0.95 to every USPS Priority Mail flat-rate item ... in the box and click ...