This is a hat I made to go with a coat that very nearly matches the Liberty Wool yarn in my Molly scarf.
The yarn is RedHeart Eco-Ways in teal.
CO 88 stitches on a 16" US 6 needle. Join without twisting.
Rows 1, 2, 3 are simply K 2, P 2.
Row 4 is K 2nd stitch, leave on needle, K 1st stitch, then remove both stitches at same time. Your first stitch will be twisted over the second, creating a mock cable design.
Repeat until you have about 6-7 inches in height, then start decreasing. You will eventually get to the point where you need double points, so switch when you need to. Continue decreasing until you have about 8 stitches left, then run the yarn through the stitches and tie off.