This set of 12 white chalks is perfect not only for colouring and decorating your blackboard book, but also for glass, plates and notebooks. No dust chalk is made with a special non-toxic and hypoallergenic formula that leaves no residue and does not stain! Easy to use and keep in your hand without getting your fingers dirty. The creativity of your little ones will no longer have limits! Set of 12 chalks Dimensions: 11 x 7.6 x 2.54 cm Chalk traces can be removed with a damp cloth. Non-toxic and hypoallergenic formula, 100% safe for children's health.