1 skein of each colour needed unless you are making the hat larger than 23” than you will need a second skein of the main colour (ie whichever colour you choose to begin the pattern with).

US 10 1/2 16” needle
1 set of 5 US 10 1/2 double pointed needles
Stitch marker

Pattern can be found as S11108 Mount Sidleyhttps://www.ravelry.com/patterns/library/s11108-mount-sidley-hat