View the source of this web page to see the CSS

border-width:
1px;
border-width:
1px 5px;
border-width:
1px 5px 10px;
border-width:
1px 5px 10px 15px;
border-bottom:1px;
border-left  :5px;
border-top   :10px;
border-right :15px;