The Conair Infiniti Pro Secret Curl Hairsetter with its unique roller system produces excellent curling power. You can achieve a professional look with a head full of spiral curls on any length hair-without leaving your home! Curls and volume are possible even on the straightest hair. With the Secret Curl Hairsetter your tight or soft curls will form quickly and last longer. And you ll appreciate the vertical design! It only has an 8-in. diameter. along with a top carrying handle and a base the cord wraps around.