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<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
  <h2>Form Control Size</h2>
  <p>You can change the size of .form-control inputs with .form-control-lg or .form-control-sm:</p>
  <form>
    <input type="text" class="form-control form-control-lg" placeholder="Large input">
    <input type="text" class="form-control mt-3" placeholder="Normal input">
    <input type="text" class="form-control form-control-sm mt-3" placeholder="Small input">
  </form>
</div>
</body>
</html>