<head>
portion of your HTML code
<link href="http://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">To use these icons, just place the name of the icon into the class of an i tag
<i class="material-icons">add</i>
To control the size of the icon, change the font-size: 30px property of your icon. Optionally you can use preset classes as shown below.
Tiny
Small
Medium
Large
<!--Sizes:tiny: 1remsmall: 2remmedium: 4remlarge: 6rem--><i class="large material-icons">insert_chart</i>