Description Jumbo Chalk. The chalks are enough for your daily use and replacement. This chalk is easy to write with and produces clear, vibrant lines on a chalkboard or other writing surface. These chalks are comfortable to grasp and smooth to write, and are erasable, very convenient. They are great for school, office, meeting room use. Features -Color:Yellow -Material:Gypsum powder -Size:10.30X2.50X2.50cm/4.05X0.98X0.98in - The chalk set, perfect for use by teachers, students, artists, and anyone else who wants to write or draw with ease and cleanliness. - Sufficient quantity to satisfy your daily requirements for usage and replacement, meeting your diverse needs. - Suitable for art project, themed birthday party, blackboard newspaper, kindergarten primary class. - The chalk is safe, erasable, and can be applied to most surfaces, like back board, wood board, sidewalk, wall and so on. - Jumbo Chalk Washable. Convenient to clean,can be safely used indoors and outdoors.Package list: 20 x big chalks