Yes I'm in PJs. Don't judge me.
Fold your fabric in half and make a knot. I'm no good with measuring so who knows how long the fabric is. I'm horrible, right? At least I know how to make a knot. That's a start....
Next, start twisting the fabric around the knot. I left the tail type thing out. More on that later. Here is a great You Tube video to show what I mean. Or just see below.
Lastly, when you have twisted, glued, sewed and made your rosette look fab, tuck the tail under. Or you could use felt. I just didn't have any.
Then I glued it to a bobby pin, but I'm sure you could put it on anything your heart desired.