Your HTML is incorrect. First, ditch the inline styling. Second, it should be...
<ul class="myList">
<li>Dresses size 1"2 & up</li>
<li>Shoes (all sizes)</li>
<li>Matching Handbags </li>
</ul>
CSS (the class can be named whatever you like, I just used "myList" as an example.)
.myList {
width:20%;
float:left;
text-align: center;
list-style-position: inside;
}
This displays the bulleted list centered on my screen. Personally, I don't like the look of a center-justified list with bullets, but that's just my preference. If that's what you want to do, the above code will do it.