Limiting and filtering
Excluding items from the list
Conversely to explicit limiting of results, you can choose to control the list items by excluding certain items. Adding exclude-es-hu to your country field classes will be useful if you don't sell goods to Estonia or Russia.
Explicit limiting of countries
You can designate the items to be returned by their code. This is limited to country fields only. So, if you only sell goods to the US, Canada and Mexico, you can add the class limit-na-ca-mx to your countries field and you'll only get those three results.
Limiting by population
You can limit the results by population and set the cutoff point yourself. Add the class limit-pop-50000 to your cities field to only return cities with over 50,000 residents.