MDL2 Icons
Example of add at 6x   Example of add at 5x    Example of add at 4x    Example of add at 3x    Example of add at 2x   Example of add

mdl2-add · Unicode: \ue710 · Categories: AppBar glyphs

After you get up and running, you can place MDL2 icons just about anywhere with the <i> tag:

Example of add mdl2-add 
<i class="mdl2 mdl2-add" aria-hidden="true"></i>

Note: to improve web accessibility, we recommend using aria-hidden="true" to hide icons used purely for decoration.