Can't apply width and height to -webkit-scrollbar using CSS

Question

::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

::-webkit-scrollbar-thumb {
    background-color:#808080;
}

Why do the width and height attri

Answer 1

This works, except for the height

Example: http://jsfiddle.net/jasongennaro/gBrNf/

Fairly certain that's because the browser determines the height of the scrollbar based on the height of the content. (More content equals shorter scrollbar... it's a visual cue I am not sure you can override.)