I've sold a number of ties on ebay (though none recently). I always used the smallest USPS Priority Mail Box. I think you need the structure of the box and it certainly leaves a much better impression with the customer. I think I folded the ties carefully in thirds, wrapped them in tissue paper and then wrapped the whole thing in a layer of thin bubble wrap that I had on hand. I never had a single complaint. This packing was probably overkill, but it pays to be careful. Think about all the complaints you've read here about tailors just throwing a suit in a box--probably makes no difference, but I think a customer really likes to see their purchase treated as a precious object. The USPS boxes are, of course, free and the packing materials I've mentioned will probably only run around fifty or sixty cents per tie which you can add to the shipping charge. It's also my impression that buyers are always happy to pay just a little more for top-rate packing.