Cemara means cypress in Bahasa Indonesia. The cable pattern on this hat ressembles cemara tree, we used to have one on our front yard.

Size
One size to fit 54-58 cm head circumference
Length from brim to top about 20 cm

Needles
4.0 mm circular needle (at least 40 cm long) or dpns, or appropriate size to get gauge.
3.5 mm circular needle (at least 40 cm long) and dpns, or 0.5 mm smaller than the gauge needle.

Other
cable needle, stitch marker, tapestry needle for weaving.

Gauge
18 sts and 24 rnds in 10 cm in cable stitch worked in round with needle 4.0 mm. Take time to save time and check your gauge. Adjust needle size if necessary to obtain the correct gauge.