Result Size: 625 x 664
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<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<body>
<div class="w3-container">
  <h2>Borders</h2>
  <div class="w3-panel w3-border">
    <p>I have borders.</p>
  </div>
  
  <div class="w3-panel w3-border-left">
    <p>I have only a left border.</p>
  </div>
  
  <div class="w3-panel w3-border-right">
    <p>I have only a right border.</p>
  </div>
  
  <div class="w3-panel w3-border-top w3-border-bottom">
    <p>I have top and bottom borders.</p>
  </div>
</div>
</body>
</html>