10" long, 5/16" diameter soft, flexible Super Rollers are easy to use. Good for perming and setting. Will not absorb perm solution. Roll the hair from the end towards the scalp. Bend the ends of the roller to secure. For best results, use on damp hair. For setting, remove rollers when hair is dry.

This photo shows 5/16" (0.8cm) diameter curls on a 20" long hair wig. (the mannequin size is smaller than real people)