We use Google Material Icons by Google. They provide a searchable list (which we do not include in the documentation here), which will also show you the relevant icon names for the CSS classes. You can download the icons directly from the Material Design specs.
Usage
To be able to use these icons, you must include this line in the <head>
portion of your HTML code
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
To use these icons, use the material-icons class on an element and provide the ligature as the text content.
<i class="material-icons">add</i>
Sizes
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.
insert_chart
Tiny
insert_chart
Small
insert_chart
Medium
insert_chart
Large
<!--
Sizes:
tiny: 1rem
small: 2rem
medium: 4rem
large: 6rem
-->
<i class="large material-icons">insert_chart</i>