1 1/4 inch
These can be found on many websites so I suggest you google it. You can find these in your local sally beauty supply. They do carry different version these but just slight different with the name call helen of troy and instead of metal it's plastic. I've heard that these metal one are far more better then the plastic purple ones so I would say to stick to these. BTW, I got mine for a bargain from Ulta when they were having a hot tool sale.