Difficulty level: intermediate.
Knitting time: 5 hours.

Materials and tools:
Yarn: lace weight yarn 875 yds/3.5 oz (800 m/100 g). I use Kauni 8/1 (Lace, 100% wool, 875 yds/3.5 oz (800 m/100 g)), held double.
Needles: US 0 (2.0 mm) double pointed needles.
Notions: row counter, 4 stitch markers.
Gauge: 30 sts = 4’’ (10 cm).
Construction: the hat is worked in the round in one piece bottom up.