I can see in your style sheet that you have this:
#sidebars {
float: right;
margin-top: 0px;
margin-left: 15px;
padding-top: 5px;
width: 350px;
}
The width is 350px. To make it bigger, just change the width, but you’ll need to make your main content narrower.
A good tip when working with css in order for your to see what’s going on, just add a background colour to your divs.
So add
background-color:yellow; to #sidebars
and
background-color:pink; to #contentwrapper
These background colours will help you see what’s going on and which div does what.
