40 white dry erase sheets on a 100 foot roll. Each perforated Cling-rite Roll sheet is 20 x 30 inches. Cling dry erase sheets to most indoor smooth surfaces. They are repositionable, erasable, recyclable and remarkable. Reuse with dry erase or low odor markers, or use other markers or acrylic paint for single use. Will not harm surfaces. Cling lightweight paper onto the surface for storyboarding, or under it for tracing images, no tape or adhesive required. Perfect for the home office, distance learning, home school, and art projects. Cling-rite is safe and easy to use. Cling-rite sheets are reusable and very easy to move from one location to another. No adhesives, will not leave residue.