Spiraling Stripes Hats
This is a pattern set with 6 different versions. There's the wide straight brim, the slanting brim, and no brim, each with a clockwise spiral and counter-clockwise spiral pattern.
You can use any self-striping yarn, or stripe between 2 or more solids. There are tons of variations in the pdf with yarn ideas, and slouching/beret style versions, made with simple pattern modifications.
These hats are a fun way to play with short-rows on a small scale; great for beginner knitters wanting to try something a little more complex!
Size: adult medium-ish, with slouchy/larger variations
Yarn: around 90 yards of worsted to aran weight, more for the beret styles
Needles: pair of size US 9 straights or sized to get 4.5 stitches/inch
Skills needed: short rows, increases + decreases, provisional cast-on, 3-needle bind-off (all technique instructions are included in the pattern)