Oversized chalk is perfect for creating art on paper and on outdoor sidewalk for its color and strength. Withstands wind and rain and does not wash away unless you want it to (must be power washed). Chalk comes in an array of 12 assorted colors that blend and burnish easily. Chalk Color: Assorted. Quantity: 12. Diameter: 1". Length: 4". Brillant colors and strong Certifications and Standards: AP Certified non-toxic.