Rainton is the only hat in Head to Toe that was designed upside down. It starts at the tip of the crown with a mere few stitches that round by round grow into a hat! You can add earflaps with pulls to it if you fancy, or just stop at a beanie shape, it's completely up to you. As a bonus, the knit and purl stitch pattern makes this hat completely reversible, so that it can be put on any-side-out or in, for that matter.
Here, for example, the largest size will fit a head of 24 inches / 61.5cm in circumference and the pattern tells you to make it 4¾ inches / 12cm deep before moving onto the earflaps. 24 inch head easily falls in the upper end of the adult head sizes as well, but to make the hat fit an adult noggin you'd want to add an inch or two to its depth.
With a top down pattern in particular you can try the hat on as you go and stop at the depth you're happy with, just like that!