For the first hat I used my own handpainted fingering wool(sockyarn) and some left-overs (orange and purple merino Flavia Baby Grignasco). In this case I used a circular needle 2,5 mm because I knit a bit too loose. Normal needle-size for knitting this hat is 3 mm.
For the second hat (green one) I used alpaca together with my own handspun (alpaca) and for the last one I used several woolen handspun left-overs.

Thank you very much Gini Westera and José Gralike for testknitting! You both did a wonderful job!

Soon I will write this pattern (which has a chart) in English.