Change the height of banner

http://prntscr.com/ng3aa I like the width for the banner as it is but I want to change the height so the banner we're making fits in?
http://yugioh-universe.findforum.net/forum the main banner

Code:

#pun-intro {
    background:#183B5B url(http://the5ds.files.wordpress.com/2008/06/banner1.jpg) repeat top center;
    border-bottom-color: #1B3759;
    border-bottom-style: solid;
    border-bottom-width: 0px;
    min-height: 64px;
    margin-left: -12px;
    width: 998px;
    margin-top: -12px;
  }

Edit that:

Code:

    min-height: 64px;

Replace 64px with another value in px or percents ( % ).
Try this:

Code:

    #pun-intro {
        background:#183B5B url(http://the5ds.files.wordpress.com/2008/06/banner1.jpg) repeat top center;
        border-bottom-color: #1B3759;
        border-bottom-style: solid;
        border-bottom-width: 0px;
        min-height: 164px;
        margin-left: -12px;
        width: 998px;
        margin-top: -12px;
      }

Your existing banner height is 151px.

min-height: 164px;

Is that what has to be changed?

min-height is the minimum height that that element can be. If the image is not bigger than 164px then it won't change, only the size of the element will.