#main_box {
    border: 3px #ac391c solid;
    min-width: <?php echo $box_width; ?>px;
    min-height: 425px;
    }
  
  
  * html #main_box {
    border: 3px #ac391c solid;
    width: <?php echo $box_width; ?>px;
    height: 425px;
    }