Whiteboard Stickers with 2m lenght x 45cm width comes with the Flexichalk 4 Colourful Liquid Chalks. Ideal for all smooth surfaces such as blackboard, whiteboard, window and glass surface. The tip is with 6mm thick and 4g ink which can write about 300 words. It is conform to EN71-3 European Toy Standard, which is safe to use for children over 3 years old.