I had trouble with some of today's drawings. The lines were so light, the camera couldn't figure out where to focus, so I kept getting blurred photos. I ended up darkening lines on a couple of these.
Maybe the drawing looks better than the photo in this case.
I suppose I could call this "17 Inches" (i.e. not quite a foot and a half).
I held the camera above my head (hence the odd arm position on the drawing's right) and took a photo down, so that I could approximate this sort of perspective.