Swirly, Twirly Tam by Mary C. Gildersleeve

Swirly, Twirly Tam

Knitting
worsted weight self-striping wool
Worsted (9 wpi) ?
17 stitches and 24 rows = 4 inches
in stockinette in the round
US 8 - 5.0 mm
100 yards (91 m)
adult med head
English
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… this tam knits up quickly but looks saucy and sophisticated once finished. Shown in Universal Yarn’s Poems Silk (which is 75% wool and 25% silk in “All the Way” colorway), this tam starts at the top tab and works out and down to the 1-1/2” ribbing and uses approx. 100 yards of worsted weight yarn.

You could use any worsted wool yarn, self-striping or solid. A bit of a halo makes the hat really look great.

If you want to make a different size just stop at the appropriate diameter, work 2-3 inches even, then dec one-third and do rib:
baby (0-6m): 8”
toddler (12-18m): 9”
child (2-8yo): 10”
teen - adult sm: 11”
adult med: 12”

for larger size tam, more yarn will be needed (the adult med took just about all the skein).