How big should Action Bar(Toolbar) icons be in the new Android Material design?

Question

I tried searching the design guidelines, but I couldn\'t find anything related to this. I am trying to figure out the optimal size for Action bar icons in the new L release.

Answer 1

From Material Design Keylines Touch Target Size, size for icons is 24dp

Answer 2

Full icon size should be 24dp with a "live" area of 20dp. See this answer: https://stackoverflow.com/a/14908467/3979479