My BOUSHI crochet hat pattern

My BOUSHi is the pattern for crochet hat. There are for adults (Size M head circumference 55cm, size L 57cm) and for kids (3-4T 52cm 5-6T 54cm) As the number of cast on is the same for all sizes, you can arrange the size as you want.

Materials
Yarn used: Hamanaka eco ANDARIA (80m/skein 40g)
Any worsted weight yarn could be used
For adults
Size M navy 3skein
Size L black 4 skein(3.2 skein used)

For kids
3−4T black 2 skein
5−6T black and navy total 3skein(2.2 skein used)

Needle: 3.5mm crochet hook

Optional : 0.7mm plastic wire for keeping shape
Thermal compression tube for connecting the wire
Ribbon
Chin strap

Size
Head circumference
For adult
Size M about 55cm
Size L about 57cm
For kids
3-4 T about 52cm
5-6T about 54cm

Brim
For adult
Size M 10cm
Size L 13cm
For kids
3-4T 7cm
5-6T 8cm