10 different beautiful colors blend together to create many different looks; the length of the comb is approximately 3.99 (10 cm). Non-toxic and easy-to-clean hair chalk is non-toxic, allergy-free and water-soluble. Wash off with regular shampoo and water. How to Use These hair chalks are easy to apply on light colored hair such as gray and blonde hair. But it is a bit difficult for dark or brown hair, you can add a little water first and then blow dry with a blow dryer or fan, which will better apply the color to the hair. Chalk can be a little sticky. Easy and fast to use Change hair color in just minutes: Apply directly to hair, the comb applicator quickly and easily applies dazzling color to hair for a beautiful and unique look Suitable for crowds and festivals New Hair Chalk Suitable for 4 - 10 year old girls birthdays, parties, weddings, clubs, festivals, cosplay, engagements, St. Patrick's Day, Easter eggs and more to create a beautiful and unique look for you. Cool gift for family and friends.