No limits are available. Then sites are listed, presumably in order by some relevance score, but the method is not described. Open Directory first displays up to five categories. Then sites are displayed with their title hyperlinked to the URL, a brief description, the URL, a linked connection to the category in which the site is listed, and a number in parentheses. Entries are all selected by the editorial team of over 30,800 editors.
Many entries also come from submissions.
See the bottom of their opening page for a current count. Open Directory will star some sites and these are listed at the top of the category listing.