Horizontal rib stitch on hat brim

Hey everyone! Quick question. I want to knit a hat like the one below for my sister and I loooove the brim, but I can’t seem to figure out how to knit it in the round. Is there a way to do so?

It looks like it’s knit back and forth, then the cast on and cast off ends are joined and sts for the body of the hat are picked up around one side to knit in the round. If you start with a provisional cast on, you can graft the cast on and cast off edges.

That’s what I was thinking, I just wanted to make sure:-) Thank you so much!