The hat is worked bottom up in rounds with 1x1 ribbing. The knitting starts with the Italian (tubular) cast-on, which gives the hat a factory-like edge. In this instruction-pattern, you will find calculations for specific yarn and gauge, as well as formulas for adjusting the gauge for other yarns.
The pattern is available in 5 sizes: 48-50 cm (18.9-19.7 inches), 51-53 cm (20.1-20.9 inches), 54-56 cm (21.3-22.0 inches), 57-59 cm (22.4-23.2 inches), 60-62 cm (23.6-24.4 inches)
(toddler, child, adult S M L)
Pattern includes yarn and needle suggestions, and calculations that will help you to work the hat with your gauge and yarn.

Techniques Used: Italian CO, right and left leaning decreases, magic loop.
All techniques explained in pattern and accompanied by videos.
YARN
100 g (2 skeins) Sesia Mistral (50 g - 175 m) or
100 g (2 skeins) Drops Nord (50 g - 175 m) or
100 g (2 skeins) Drops Baby merino (50 g - 175 m) or
100 g (2 skeins) Sandnes Garn Babyull lanett (50 g - 175 m)
GAUGE
44 sts x 40 rows = 10x10cm 4x4’ in ribbing washed and unstreched
NEEDLES
Circular needles
2 mm 40 cm US 0 16” for CO
3 mm 40 cm US 2.5 16” for main knitting
3 mm 80 - 100 cm us 2.5 32 - 40” for working the top of the hat with magic loop
You will also need markers and tapestry needle.