The padding property

h1 {padding: 10px}
the padding will be 10px on all four sides

h1 {padding: 10px 2%}
top and bottom padding will be 10px, left an right padding will be 2% of the width of the closest element.

h1 {padding: 10px 2% 15px}
top padding will be 10px, left and right padding will be 2% of the width of the closest element, bottom padding will be 15px

h1 {padding: 10px 2% 15px 20px}
top padding will be 10px, right padding will be 2% of the width of the closest element, bottom padding will be 15px, left padding will be 20px

• This property does not work properly with inline elements, and images

Note in IE 5.0+:

• This property does not work properly with tables, table cells and input fields

Note in IE 5.5 Beta 1: 

• This property works with inline elements

Note in Netscape 4.0+:

• This property does not work properly with inline elements, list items, tables, and images