A fun way to colour your hair temporarily especially for festivals and clubbing. This pack has 7 chalks in side each measuring just over 4cm in length and 1cm wide. You can create some amazing looks with these. The instructions are on the reverse of the pack aswell as all the relevant warnings including not suitable for children under 6 years of age. Just a word of advice its probaly better to do it in the bathroom where you have a washable floor not on a cream carpet where our daughter tried it as the powder does drop.