This is another variation of my standard crochet hat, but made in a worsted yarn, which makes it a decent winter hat. It also has a slightly different edge - instead of rolling, it is turned up by doing a couple of rows in the front loops only of the previous rows, so you can fold there easily. It is very simple to do, and quite quick. I’ve used Lion Brand Heartland yarn, which is lovely and soft.
If you want it larger or smaller, just do more or fewer rows of the increases, it will be fine.