Android Notification Action Icon Sizes in Material Design

Question

What should be the icon sizes in the notification action (button) for the material design? I am looking for the complete icon sizes (icon bounds/optical bounds).

I came across a very similar question:

What are the sizes of the icons in Android notifications action-buttons?

but that was prior to material design era. On top of that, the selected answer is incomplete since it does not specify the icon sizes(icon bounds/optical bounds) for every device density.

Answer 1

Please try with the ActionBar icon size. It will look good. Or you can generate Generic icon using the following link and use it. Icon Generator