CSS Float does not stretch Div Height

Question

I have had this problem for a long time when working with HTML/CSS and Floats.

In the image you can see I have a Box Div that is Floated left as there is many of these Boxes. Inside the Box I have a <UL> List. The List items <li> are also Floated left.

As you can see in the image, the List items do not make the Box Div that they are inside of Expand. I have tried several thing without much luck and was hoping someone with more experience could help? I cannot set a fixed height on the Box Div as the number of icons is always different and it needs to expand to fix them.

Live demo: http://jsfiddle.net/jasondavis/u5HXu/

<div class="module-box">
    <div class="module-box-title">
        <h4><i class="icon-cogs"></i>Admin Settings</h4>
        <div class="tools">
            <a href="#" class="collapse">-</a>
        </div>
    </div>
    <div class="module-box-body" style="display: block;">


        <ul>
            <li>
                <a href="#">
                    <img src="http://cp.codedevelopr.com/modules/password_assistant/assets/icon.png" border="0">
                    <span class="module-icon password_assistant"></span>
                </a><br>
                <a href="#">Change<br>Password</a>
            </li>
            <li>
                <a href="#">
                    <img src="http://cp.codedevelopr.com/modules/password_assistant/assets/icon.png" border="0">
                    <span class="module-icon password_assistant"></span>
                </a><br>
                <a href="#">Change<br>Password</a>
            </li>
            <li>
                <a href="#">
                    <img src="http://cp.codedevelopr.com/modules/password_assistant/assets/icon.png" border="0">
                    <span class="module-icon password_assistant"></span>
                </a><br>
                <a href="#">Change<br>Password</a>
            </li>
        </ul>


    </div>
</div>

CSS

/* Modules homepage */
.module-box {
    margin: 0px 0px 25px 25px;
    padding: 0px;
    float: left;
    width: 464px;
}

.module-box-title {
    margin-bottom: 0px;
    padding: 8px 10px 2px 10px;
    border-bottom: 1px solid #eee;
    color: #fff !important;
    background-color: #333;
    height: 51px;
    line-height: 45px;
    border-radius: 3px 3px 0 0;
}

.module-box-title h4 {
    display: inline-block;
    font-size: 18px;
    font-weight: 400;
    margin: 0;
    padding: 0;
    margin-bottom: 7px;
}

.module-box-title .tools {
    display: inline-block;
    padding: 0;
    margin: 0;
    margin-top: 6px;
    float: right;
}
.module-box-title .tools a {
    font-size: 31px;
    color: #fff;
    text-decoration: none;
    line-height: 29px;
}

.module-box-body {
    background-color: #fff;
    border: 1px solid #ccc;
    border-top: 0;
    padding: 10px;
    clear: both;
}

.module-box-body a {
    font-family: 'Source Sans Pro', sans-serif;
    font-size: 11px;
    color: #888;
    text-decoration: none;
}

.module-box-body li {
    float: left;
    margin: 0 12px 0 0;
    list-style: none;
}

Answer 1

You need to clear your floats using a clearfix or clearing element.

Method #1 clearfix

.clearfix:before,
.clearfix:after {
    content: " ";
    display: table;
}

.clearfix:after {
    clear: both;
}

.clearfix {
    *zoom: 1;
}

Then you add the class on the containing element

 <div class="module-box-body clearfix" style="display: block;">

http://jsfiddle.net/u5HXu/8/

Method #2 Clearing Element

.clear {
    clear: both;
}

Then you add the following HTML after your floated elements.

<div class="clear"></div>

http://jsfiddle.net/u5HXu/9/