The pattern are based on the saying in Mandalorian.

Circumference: 54 cm
Gauge: 20 stitches per 10 cm
Recommended needles: 3.5 mm
Yarn: Sandnes garn Smart, 100 m per 50 gr
Yarn usage: Main color 50 grams
Contrast color (CC) 10 grams

Note: The headband is elastic, so it will be better to knit it a bit smaller than bigger than you think if you’re following the gauge.

Here’s an overview of other sizes if you would like to knit it up in a different yarn or gauge. Change needles according to gauge.
24 stitches = 45 cm
23 stitches = 47 cm
22 stitches = 49 cm
21 stitches = 51 cm
19 stitches = 57 cm
18 stitches = 60 cm