Versatile: Variable sizes for different hair lengths and type of hairs,Open design for better air circulation. Easy and comfortable to use: Easily stick to the hair without pins or clips and are gentle to hair. Create waves, volume, and lift with no mark on hair marks. This self- grip roller set smooth the hair,leaving no indentation marks.Use them on wet,damp or dry hair,with or with out styling lotion or gel. Package:36 pieces include: 18 hair curlers, 18 color hair clips (6 large, medium and small), high-grade transparent pvc bag packaging, curling iron is about 63mm long, large diameter: about 44mm, medium diameter: about 36mm, small size Diameter: about 28mm, hairpin length is about 77mm