Comes in sets of 2 or 4.
As seen in photos there is a 90 degree flat curl or a more rounded curl.
Each set of 2 will come in 1/2" and 3/4" on one curler. 3/8" and 5/8" on the other curler giving you 4 sizes.
The set of 4 will be a set of 2 straight and a set of 2 curled shape units.