on 10-31-2012 10:03 AM
Priority boxes are free. The size you need is the size that will fit your item. There are many sizes, and probably a FR box won't work, so you will need a regular Priority-by-weight box.
Since you have already sold the shoes, you will have to go to your PO and see if they have a box that will work. Or you can just find an ordinary corrugated box somewhere and use that.
You should have had this figured out before you listed, not after you sold.
on 10-31-2012 10:06 AM
No a shoe box will not fit in a large priority flat rate. Get a box that fits and ship USPS priority. You can order from USPS all sizes of FR boxes to be shipped to your home. But it won't work for a shoe box.
on 10-31-2012 10:05 AM
If you are going to ship them with the original box as you mentioned, you need a bigger box than the original.
Measure the original box and visit usps.com to see if it will fit inside the medium FRB. You may need a large FRB.