It fits Yahoo perfectly!
It's snug and stretchy and she wears it all the time.
It's stretchy enough to even fit me comfortably. It's just a little short for an adult head though so I'm making another one for Purse Gurl that's the same width but just a bit longer.
If you are interested, here's my version of the pattern. It's not perfect but it works.
Use a set of double pointed needles and yarn to obtain gauge. I used medium weight yarn and sz.3 needles, In double rib pattern (k2,p2) 16st.= 3in.
Cast on 94 stitches. (My head circumference is about 22 inches. If you want a larger hat add 4 stitches for an additional inch.) Work in k2,p2 double rib pattern on every round for 2 inches.
Row 1; k2tog, yo - repeat this for one round
Row 2; knit
Repeat these two rows for 4 1/2 inches for an adult hat or 4 inches for a toddler hat.
Row 1; k2tog, k2tog, yo - one round
Row 2; knit
Row 3; k3tog, yo, k2tog, yo - one round
Row 4; knit
Repeat these four rows until you have 18 stitches or fewer left. k2tog all around. You should have 9 or so stitches, then use a yarn needle to pull remaining stitches tight and weave in ends.
Stay warm this fall!