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

add display:block;

demo

p > a.infolink::before {
    display:block;
    content:'?';
    background: blue;
    color: white;
    width: 20ex;
    height: 20ex;
    border:1px solid #000;
}