As seen on below, you must describe your item for sale in basic detail. For instance, if you have black jacket, type in the brand, gender, size, color, material, and item (i.e. jacket). So, a "Nike Men's X-Large Blue Fleece Sweater" would suffice.

Thereafter, eBay's search engine will make a short category list of what the item most accurately pertains to. For my given example above, this will show up:

"Select a matching category for your item:

Select another category"