Priority Flat Rate

[kris9618]

I want to ship a large Priorit flat rate box.  The option for a  large flat rate shows a different size (I'm using the square box not the shirt box) and there is a range which I don't understand since its a flat rate. Plus it requires a fill in amt. What should I do? Thanks 

[christworks]

@kris9618  If it is the current large flat rate PM box, the outer measurements are 12-1/4 x 12 x 6 inches. You would enter the dimensions as 12 x 12 x 6 since 12-1/4 rounds down to 12. If you are buying your postage on eBay, I believe there is an option for Priority Mail Large Flat Rate Box. 

Priority boxes show both the inner dimensions (ID) and outer dimensions (OD). You always want to use the outer dimensions. 

[kris9618]

It did work. I was working on a pc without the app. When I switch to my Ipad with the app it worked out. Thanks again.