<!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 rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Input Sizing</h2>
<p>The form below shows input elements with different heights using .input-lg and .input-sm:</p>
<form role="form">
<div class="form-group">
<label for="inputdefault">Default input</label>
<input class="form-control" id="inputdefault" type="text">
</div>
<div class="form-group">
<label for="inputlg">input-lg</label>
<input class="form-control input-lg" id="inputlg" type="text">
</div>
<div class="form-group">
<label for="inputsm">input-sm</label>
<input class="form-control input-sm" id="inputsm" type="text">
</div>
<div class="form-group">
<label for="sel1">Default select list</label>
<select class="form-control" id="sel1">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
</select>
</div>
<div class="form-group">
<label for="sel2">input-lg</label>
<select class="form-control input-lg" id="sel2">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</div>
<div class="form-group">
<label for="sel3">input-sm</label>
<select class="form-control input-sm" id="sel3">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</div>
</form>
</div>
</body>
</html>