Margin

The margin clears an area around an element (outside the border). The margin does not have a background color, and is completely transparent.
The top, right, bottom, and left margin can be changed independently using separate properties. A shorthand margin property can also be used, to change all margins at once.
Possible Values

Value	Description
auto	The browser sets the margin. The result of this is dependant of the browser
length	Defines a fixed margin (in pixels, pt, em, etc.)
%	Defines a margin in % of the containing element

It is possible to use negative values, to overlap content.
Margin - Individual sides
In CSS, it is possible to specify different margins for different sides:

Example margin-top:100px; margin-bottom:100px; margin-right:50px; margin-left:50px;