A hat to celebrate Pi Day (March 14).

Three Slices of Pi is a fun little hat that incorporates Pi in three different ways. From the ribbing of the brim to the stripe sequence to the wedges of the crown, pi controls the look all the way through. It’s a quick knit in four colours of fingering weight yarn, perfect for using up scraps of sock yarn. It will also look great worked in a self-striping yarn so if you have a special skein that doesn’t want to be socks, this is the pattern for it and you’ll still get two delicious slices of pi. The hat features a snug folded band for double the warmth over your ears and just a little bit of slouch.

This pattern was run as an MKAL from March 1-13, 2017 before its full release on March 14, 2017. The discussion thread can be found here.

Level: Beginner

Skills required: Beyond basic knits, purls, increases, and decreases, the only special skill this hat needs is a provisional cast on. It really is as easy as pi.

Instruction type: Entirely written, no charts. Includes a round-by-round reference table for tracking.

Yarn: You’ll need 4 colours of fingering weight yarn, approximately 280 yds (260 m) in total. Expect to use about 75 yds (70 m) for the band, 45 yds (42 m) for stripe colour 1, 60 yds (55 m) for stripe colour 2, and 100 yds (92 m) for stripe colour 3.

Notions: Stitch markers (1 in one colour or style, 2 in another), spare needle, tapestry needle

Size: 17”/43 cm circumference stretches to 26”/66 cm, comfortably fits an average adult