表单控件大小
您可以分别使用 class .input-lg 和 .col-lg-* 来设置表单的高度和宽度。
实例：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Bootstrap历练实例：表单控件大小</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<link rel="stylesheet" href="bootstrap-3.3.5-dist/css/bootstrap.min.css" />
</head>
<body>
<div class="container">
<form class="form-horizontal" role="form">
<div class="form-group">
<input type="text" class="form-control input-lg" placeholder=".input-lg" />
</div>
<div class="form-group">
<input type="text" class="form-control" placeholder="默认输入"/>
</div>
<div class="form-group">
<input type="text" class="form-control input-sm" />
</div>
<div class="form-group"></div>
<div class="form-group">
<select class="form-control input-lg">
<option>.input-lg</option>
</select>
</div>
<div class="form-group">
<select class="form-control">
<option>默认大小</option>
</select>
</div>
<div class="form-group">
<select class="form-control input-sm">
<option>.input-sm</option>
</select>
</div>
<div class="form-group">
<div class="row">
<div class="col-lg-2">
<input type="text" class="form-control" placeholder=".col-lg-2" />
</div>
<div class="col-lg-3">
<input type="text" class="form-control" placeholder=".col-lg-3" />
</div>
<div class="col-lg-4">
<input type="text" class="form-control" placeholder=".col-lg-4" />
</div>
</div>
</div>
</form>
</div>
<script src="jQuery/jquery-2.1.4.js"></script>
<script src="bootstrap-3.3.5-dist/js/bootstrap.min.js"></script>
</body>
</html>