In The Groove Cap by Nancy Wyatt

In The Groove Cap

Crochet
Bulky (7 wpi) ?
13 stitches and 7 rows = 4 inches
in single crochet (sc)
5.5 mm (I)
366 yards (335 m)
21" circumference
English
This pattern is available for free.

Calls for one ball each of three different colors, but it appears there will be leftovers of at least two colors.