During one of my early forays into hat making, I decided to use the supersoft baby yarn that i have. I figured it would make a cozy hat, and it did. I neglected to compensate for the thickness of the yarn by decreasing the needle size, and boy was that a mistake. The hat is HUGE. I will let you judge for yourselves.
Adam in the hat (he thinks it makes people look like mush mouth from Fat Albert:
Autumn in the hat:
Carrie in the hat:
and Xan in the hat (with her Golden Snitch around her glasses):