The pattern
About Ni Ju Ni
The design uses De Rerum Natura Gilliatt, a worsted-weight yarn. The stated gauge is 18 stitches and 24 rows per 10 cm in stockinette after blocking, with 4.5 mm needles.
This hat is part of the MarGueNée Advent Calendar 2017 collection. The pattern is available in English and French.