Xem ví dụ

<!DOCTYPE html>
<html>
<head>
    <title>Xem ví dụ</title>
    <style type="text/css">
        div{
           margin:100px;
           width:200px;
           height:100px;
           border:30px solid transparent;
           border-image-source:url(../image/pattern4.png);
           border-image-slice:50 50 50 50;
           border-image-outset:0px;
        }
    </style>
</head>
<body>
   <div>
      <a href="../image/pattern4.png" target="_blank">(xem ảnh gốc)</a>
   </div>
</body>
</html>

0px

20px

2 (tương đương 60px)

2.5 (tương đương 75px)

initial