This easy knit slip-stitch hat is designed in two sizes and in (1)bulky or (2)Worsted/Aran weight yarn. There are two alternate versions a 3 color and 2 color version that look quite different.

Worsted Weight uses size 7 and 8 needles, 3 color adult size uses 75 yards color B and 30 yards Color A and 30 yards color C. 2 Color uses 85 yards B and 45 yards Color A
Bulky Yarn uses size 9 and 10.5. 3 color adult uses 70 yards color B and 27 yards color A and 27 yards color C. 2 color adult uses 70 yards Color B and 50 yards color A.

2 adult size options and 1 child size about age 8. Easily modified since stitch multiple is 6.

Errata 11-9 version p. 3 three color chart Rnd 7 is Color A