Sometimes people ask how I made the pattern on the crown of the hat. It’s made (accidentally) by decreasing the number of stitches. Most written patterns say K2tog, knit two stitches together. That gives the hat the ridges as the circle becomes smaller towards the top of the head.
There are other methods. SKPO (slip one stitch onto the right hand needle, knit one then pass the slipped stitch over the knitted one) gives a ridge leaning the opposite way to k2tog. In theory, slipping two stitches knitwise then knitting them together as in the photo above will give a tidier result.
berry daines 