I was requested to knit a hat for the cold winter mornings in Namibia. The main design guidelines and the yarn choice where made by the petitioner. I only developed the idea that was given me, knitted, and finally put my notes on paper.
The dimension is calculated for 54 cm head contour. The elasticity which gives the 2+2 rib and the cables made it ajustable to most head mesures
Gauge: 24 st - 10 cm in stockinette
Use any yarn/needle that gives you a similar gauge (23/24 st - 10 cm)