The following code shows how to height Sizing Form Controls.
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet"
href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
<link rel="stylesheet"
href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap-theme.min.css">
<script type="text/javascript"
src="http://code.jquery.com/jquery.min.js"></script>
<script
src="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
<style type="text/css">
.bs-example {<!--from w ww . j a v a 2s . c o m-->
margin: 20px;
}
</style>
</head>
<body>
<div class="bs-example">
<form>
<div class="row">
<div class="col-xs-6">
<input type="text" class="form-control input-lg"
placeholder="Larger input">
</div>
<div class="col-xs-6">
<select class="form-control input-lg">
<option>Larger select</option>
</select>
</div>
</div>
<br>
<div class="row">
<div class="col-xs-6">
<input type="text" class="form-control" placeholder="Default input">
</div>
<div class="col-xs-6">
<select class="form-control">
<option>Default select</option>
</select>
</div>
</div>
<br>
<div class="row">
<div class="col-xs-6">
<input type="text" class="form-control input-sm"
placeholder="Smaller input">
</div>
<div class="col-xs-6">
<select class="form-control input-sm">
<option>Smaller select</option>
</select>
</div>
</div>
</form>
</div>
</body>
</html>