<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
<link rel="stylesheet" href="https://code.getmdl.io/1.1.1/material.indigo-pink.min.css">
<script defer src="https://code.getmdl.io/1.1.1/material.min.js"></script>
<body style="padding:80px">
<button id="large-demo" >Hover Me</button>
<span for="large-demo" class="mdl-tooltip mdl-tooltip--large">This is large font demo. </span>