By available in 8'x10' are you referring to in stock available or originally created available? Ie, it does/does not exist in what might be called large.

If understand correctly, you want to narrow down the items displayed based on some selection method that would present/eliminate items that do not match the chosen criteria. One suggested method was to apply items to at least one cateogry. The category need not be displayed, but can be used to filter items. Regardless of the method applied, going to have to maintain the items and chosen method of grouping. Might almost bebetter to have common terminology in the details of the product to be able to search on, just throwing out a third option.