I have really short hair. And no curl anymore. Perms are no good because the hair on the top of my head won't take the curl; I always had to use a curling iron anyway. I had a lovely 1/2" barrel iron when I lived in Germany! But it did not compute to 120v back home. I always stop at the curling iron displays looking for the elusive 1/2" one. I bought a 1" one years ago but can only use it just before a haircut, when my straight, short hair makes me resemble a dandelion.
It has 30 heat settings which means I can keep it really low and use it on the top of my hair daily. This one is by Revlon. And it was $10.
So there is hope for those of us with really short hair who would like a little curl. Just so you know.