Reply To: Center text in box

Smaller font size:

#content, .widget-container {
font-size: 80%;
}

Centered box text with background color and other styles at your disposal:

.box {
background: none repeat scroll 0 0 #EEEEEE;
border: 4px double #CCCCCC;
box-shadow: 0 0 2px #CCCCCC;
float: left;
margin: 1%;
padding: 1%;
text-align: center;
}