This pattern is available as a free Ravelry download
This pattern construction start from top (center of beanie) to bottom and knitting in the round.Also I provide two option for brim pattern.

Size
1 size only with head circumference around 40-60cm and 17cm deep.

Material
I used Benang Nona (Malaysian Acrylic Yarn) (40g) for Alif Beanie with Diamond Lace Pattern.
I used unbranded acrylic yarn (30gr) for Alif Beanie with Diamond Purl Pattern.
Any acrylic fingering can be used in this pattern.

Needle size
3.5mm for knitting the kopiah and 5mm for bind off