When it comes to sidewalk chalk, this is the best. There are 12 large 4" × 1" round sticks. The colors include Red Violet, Orange, Yellow, Green, Blue, Violet, Brown, Black, White, Red Orange, Yellow Green, and Red. These chalks are not good for regular chalk boards because they are difficult to erase. To erase them quickly actually requires a power water hose. They are not considered toxic, and so should not be harmful to the user. Made by Prang.