How can I center <ul> <li> into div

To center the ul and also have the li elements centered in it as well, and make the width of the ul change dynamically, use display: inline-block; and wrap it in a centered div.

<style type="text/css">
    .wrapper {
        text-align: center;
    }
    .wrapper ul {
        display: inline-block;
        margin: 0;
        padding: 0;
        /* For IE, the outcast */
        zoom:1;
        *display: inline;
    }
    .wrapper li {
        float: left;
        padding: 2px 5px;
        border: 1px solid black;
    }
</style>

<div class="wrapper">
    <ul>
        <li>Three</li>
        <li>Blind</li>
        <li>Mice</li>
    </ul>
</div>

Update

Here is a jsFiddle link to the code above.

Since ul and li elements are display: block by default — give them auto margins and a width that is smaller than their container.

ul {
    width: 70%;
    margin: auto;
}

If you've changed their display property, or done something that overrides normal alignment rules (such as floating them) then this won't work.

I love flexbox:

ul {
  justify-content: center;
  display: flex;
}