%li
  %img{src: list_item.image_url}/
  %span=list_item.title
  %p=list_item.description
  =link_to "REF", list_item.link

%li
  %a{ href: list_item.image_large }
    %img{ src: list_item.image_thumb }/
  %span=list_item.title
  %p=list_item.description
  Link:
  =link_to "#{list_item.link}", list_item.link

Use large and thumb images.
Use large and thumb images.
