The chalks are enough for your daily use and replacement. Chalk is safer and reduce children from inhaling dust, especially for kids and teachers and those who have skin. Great for for school, office, meeting room use. Features -Color:Random Color -Material:Gypsum - Size: 19.50X15.00X11.00cm/7.66X5.89X4.32in - Chalk will produce less dust than traditional chalk when used on a chalkboard or other writing surface. - This type of chalk is perfect for use in classrooms, offices, and other places as needed. - Chalk has a wide of application. Adequate quantity can easily meet your needs. - The included chalk holders can effectively protect your hands from direct contact with chalk avoiding drying and cracking. - Chalk is also great for use at home, suitable for kids, children, parents and teachers. Package list: Chalks 5 x Chalk Sleeves 1 x Eraser 1