I have these clips, but these clips came with my Remington Hair Setter (aka steam rollers). The steam rollers are the only kind of rollers I would use these clip for.
I use the ones that Allandra posted. When you buy them in the professional size, they cost less and I am guessing that if you have a lot of hair, require a lot of rollers or really big rollers, that the other clips won't fit under a dryer.
I asked the girl at sallys which to get, the all purpose or the double prong and she said the double prong is easier to use and holds better so thats what I got...they were on sale for $3.49 for 100. That should be enough dont u think??? haha...