div with no content have a width 2fheight

1.shape-round{
2  width: 40px;
3  min-height: 40px;
4  background: #FF0000;
5  border-radius: 50%;
6}
7
8<! --- While using CSS, to style the div (content-less), the min-height property must be
9set to "n"px to make the div visible (works with webkits and chrome, while not sure if this
10trick will work on IE6 and lower) --->