Size of each Jumbo chalk is 0.98 inches in diameter and 3.93 inches in length.the size is perfect for toddlers little hands! Recommended for little boy and girl Each chalk is in two-colors and there will be different colors when children use different angles to draw. It increases the fun and improve the painting interest. Manufacturered by Jar Melo. Dust free and clean; non-toxic and environmentally safe chalk.easily wash off of clothes or other surface with water. Great Easter gift for kids. Draw a map outline a house or make a field; do anything you can imagine in outdoor. Tips: it is sidewalk chalk for outside for kids The sidewalk chalk sets for kids contains 1 portable plastic box 24 washable chalks (with marble pattern dot pattern rainbow pattern spiral pattern) and 2 chalk holders to avoid dirtying hands.