Alex Toys Artist Studio 16 Colored Chalks is a great way to make a temporary masterpiece. Each stick is 3in. Long with a .25in round diameter, comes in at least 2 of each color (red, orange, yellow, green, blue and purple) and is great for chalk boards or any other slate surface. Leave notes, draw pictures, learn math or spelling-anything you can do with a pencils can be done and quickly erased to clear the slate for the next project. Includes 16 sticks of white chalk. Recommended for children 3 years of age and older.