I do like a short row headband that is wider on the ears and narrow under my long hair. I will have to find the pattern I use. I haven't made one for quite a few years as I have a couple that are working well for me (in winter storage right now).
As I use varying size yarns to make it and am too lazy to do the math, it comes out varying lengths. It is supposed to button, but I either tie it permanently if it is too long, sew it together neatly if it's just right, or sew in a piece of wide elastic if it's too short, after I have tried it on for size. I do not find a knot or seam uncomfortable. If I could make one that came out the right length, a button would actually be quite convenient.
I don't know about working it in the round, as I said, the ones I make vary in size so much that it wouldn't be practical without a little math beforehand.
One of my favorites is in sock yarn, the other is in a thicker wool I got somewhere. A long color change variegated yarn works well.
I am not having any luck finding my pattern, we have a student coming so I'll have to go soon, I'll look later.
found it:
Calorimetry pattern by Kathryn Schoendorf