title: What is the navigation drawer icons size?
body: <p>I need to know the correct size (artboard and content) for Navigation Drawer icons.</p>
  
  <p>It doesn't say anything on the Navigation Drawer specs:
  <a href="http://www.google.com.br/design/spec/patterns/navigation-drawer.html#navigation-drawer-specs" rel="noreferrer">http://www.google.com.br/design/spec/patterns/navigation-drawer.html#navigation-drawer-specs</a></p>
  
  <p>Thanks!</p>