Craig: I really appreciate your attempt to help;however, I am still totally confused. I just went to the Auctiva create listing page and went to the shipping section and tried to set up a fictitious listing. I then went to the USPS site to compare the parameters. USPS is asking for 4 criteria LxWxHxG to calculate a rate. The Auctiva section only asks for 3 LxWxH. I think I mentioned that I don't profess to be the brightest bulb in the strand,but I just don't see how I can fit 4 parameters into 3 and get a correct rate. Here is a possible scenario. If you could, Could you give me an example of how you you might enter into the Auctiva template? 4#Package length=96" width(diameter)=3"height (also diameter) girth(circumference=9.42 3x3.1414 Sorry to be a dunce, but there is just something I'm not grasping and I don't want to get a bad rap or have an item returned because of insufficient postage do to my creating a listing with an incorrect calculated postage rate inside the listing.