From checking out various vanities, it looks like it's typical to have the top overhang by around an inch or so. But it's been a while since I've looked and I'm working out the dimensions of the one I'm building, and have a question. For a vanity with a 3/4" face frame and full overlay doors and drawers (also 3/4"), is that overhang measured from the face frame or the drawers? What's a typical dimension of a stone top if the depth of the vanity (measured from back to front of drawer/door) is 23"?