CODE EXAMPLE FOR CSS

div with no content have a width/height

.shape-round{
  width: 40px;
  min-height: 40px;
  background: #FF0000;
  border-radius: 50%;
}

<! --- While using CSS, to style the div (content-less), the min-height property must be
set to "n"px to make the div visible (works with webkits and chrome, while not sure if this
trick will work on IE6 and lower) --->