Pythagoras’ beret is worked bottom up starting with a Latvian braided two-color cast on aka Kihnu braided cast on. Written instructions are included and a photo tutorial can be found in the separate pdf. It’s a lovely way to start colorwork, but you can use any cast on method you might prefer.

Due to the stitch pattern and the placement of the decreases there are only two sizes: one with 144 stitches and 6 repeats of the crown chart and one with 168 stitches and 7 repeats of the crown chart. Instructions are given for both sizes.

Tech edited by Sue-Cat

Sizes
Finished measurement circumference at the brim is ± 56 cm / 19½” to fit head 55 to 58 cm / 20½” to 22¾”
Diameter small beret = ± 24 cm / 9½”
Diameter large beret = ± 27 cm / 10½”

What you’ll need
sport weight or light DK weight
± 160 to 200 m / 175 to 220 yards (half of each color)
3 mm (US 2½) circular needle
3.5 mm (US 4) circular needle
tapestry needle

Gauge
21 sts and 33 rows in stranded pattern with the larger needle and blocked = 10 x 10 cm / 4” x 4”