Untitled

Twitter Bootstrap and <p> default height: why 28px?
<head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
  <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css"/>
  <style>
    p {
      border:1px solid red;
      font-size:55px;
    }
  </style>
</head>

<body>
  <p>The text of more than 18 px is out of the red border if bootstrap.min.css connected </p>
</body>

font-size: 13px;
line-height: 18px;

p{
  line-height: 1.4em;
}

p.large {
    border: 1px solid red;
    font-size: 55px;
    line-height: 60px;
}

<p class="large">some text with the font-size of 55px</p>