See the SHAFTER HAT pattern here

Sizes: S/M – L/XL
Measurements: Circumference: 56 - 61 cm / 22”-24”’’. Height: 22-24 cm / 8 3/4”-9½“
Materials:
DROPS NEPAL from Garnstudio (belongs to Yarn group C)
150 g in both sizes in color 7120, light gray green.

The piece can also be knitted using yarn from:
“Alternative yarn (Yarn group C)” – see the link below.

DROPS CIRCULAR NEEDLE (40 or 60 cm / 16’’ or 24’’) SIZE 5 mm/US 8 – or the size needed to get 17 stitches and 22 rows blackberry pattern on 10 cm / 4’’ in width and 10 cm / 4’’ in height.

DROPS CIRCULAR NEEDLE (40 or 60 cm / 16’’ or 24’’) SIZE 4.5 mm/US 7 for garter stitch – or the size needed to get 18 stitches and 23 rows stockinette stitch on 10 cm / 4’’ in width and 10 cm / 4’’ in height.