width and height doesn't seem to work on :before pseudo-element

Question

Here is a fiddle.

foo bar baz

and

a.infolink::before
{
         


        

Answer 1

I can get it to work but not using a percentage in width. Pixels work fine

visibility: visible;
content: "stuff";
min-width: 29px;
width: 100%;
float: left;
position: relative;
top: -15px;
left: 0;