 <p>In the css file change the font-size e.g. my css file happens to be</p> <pre><code>/css/smoothness/jquery-ui-1.8.1.custom.css </code></pre> <p>and I changed </p> <pre><code>.ui-widget { font-family: Verdana,Arial,sans-serif; font-size: 1.1em; } </code></pre> <p>to</p> <pre><code>.ui-widget { font-family: Verdana,Arial,sans-serif; font-size: 0.7em; } </code></pre>