increasing the size of box in code example

Example 1: stop padding from changing div size

-webkit-box-sizing: border-box; /* Safari/Chrome, other WebKit */
-moz-box-sizing: border-box;    /* Firefox, other Gecko */
box-sizing: border-box;         /* Opera/IE 8+ */

Example 2: box sizing border box

*{
 box-sizing: border-box;
 }