... that had been at the back of my mind for a while.
Granted, the fabric is old (salvaged from one of my dresses that redefined "wear and tear" in a quite literal and embarrassing way). The hat is slightly too big. But: it was a first test. Ms Mini Model loves it (and will grow into it anyway). Ms Mini Model has very little hair on her scalp (and we love it: I doubt we have more than an inch of hair on our heads between the 3 of us). We now have the correct proportions, that can be scaled up and down at will.
All in all, a quite satisfactory project!