Answer:
The sharp slim blade, that cuts the wind.
My head bobs lazily in the sun. You think I'm cute. For my face is yellow my hair is white and my body is green.
I walked and walked and at last I got it. I didn't want it. So I stopped and looked for it. When I found it, I threw it away.
I'm a type of pizza that is folded in half before cooking to contain a filling
In the evening I'm long, in the morning I'm small; When seen in a ballroom, I'm nothing at all.
You use it between your head and your toes, the more it works the thinner it grows.