Originally Posted by
BETTY62
Well, I supose it's like the US Postal Service. Yesterday I went to mail a package in a big brown envelope I purchased at Walmart. The big brown envelope would cost me $9.60 to mail. The lady working the counter at the PO handed me one of their free priority envelopes and nicely told me if I placed the big brown envelope inside the free priority envelope and re-addressed the package I would save over $4.00. Now, how do you explain this works?
It has to do with efficiency, as it was explained to me:
The boxes are all standard size, so can be packed tightly to ship, making them more cost efficient for USPS than any other shapes, therefore you can be charged less to ship these than the "per ounce/per pound" rate.
Your envelope may be smaller than the box, however it is an odd size and probably slides when stacked, therefore is harder to ship, so you pay the customary rate to mail.