Chemo Hat by Kelley Petkun

Chemo Hat

May 2007
Worsted (9 wpi) ?
6 stitches = 1 inch
in worsted weight yarn
US 3 - 3.25 mm
200 - 220 yards (183 - 201 m)
Medium 16-18 inches circumference, unstretched
This pattern is available for free.
Errata available:

Chemo Hat - 50411
December 12, 2006 errata available
(Latest Knit Picks pdf was modified November 7, 2013)

From the Knit Picks Website:
In a difficult time, a hat knit with love is such a comforting gift. Choose a soft sport weight like Comfy Sport for a smaller close fitting hat or choose a worsted weight yarn such as Brava for a larger slouch hat. Either version will be equally beloved by your intended recipient.

Sport weight 7sts/1”
Worsted weight 6 sts/1”

Both will stretch up to 4”.

Sportweight version
16” finished circumference, unstretched

Worsted weight version
18” finished circumference, unstretched.

Knit Picks Comfy Sport
(75% Pima Cotton, 25% Acrylic; 136 yds/50grms):
Flamingo 24426: 2 balls
Knit Picks Brava
(100% Premium Acrylic, 218 yds/100grms):
Peacock 26127: 1 ball