Wells wrap the content within a rounded cornered box with a gray background.
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head><!--from w w w .j a v a 2 s . c o m-->
<body style='margin:30px'>
<div class="well">
<p>Lorem ipsum dolor sit amet, consectetur ... </p>
</div>
</body>
</html>
Bootstrap Wells comes in three variants:
<!-- w w w . java 2 s . co m-->
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap-theme.min.css">
<style type="text/css">
.bs-example{
margin: 20px;
}
</style>
</head>
<body>
<div class="bs-example">
<div class="well">Look, I'm in a well!</div>
<div class="well well-lg">Look, I'm in a large well!</div>
<div class="well well-sm">Look, I'm in a small well!</div>
</div>
</body>
</html>