These Mega Oil Pastels contain washable pigments so there are no unwanted stains. Pastels are highly pigmented for strong colors, with soft and smooth binders for easy lay-down and great blending. Pastels can be blended with water for a wash effect. They are ideal for colored paper and can write on most surfaces. Their mega size is 0.65" (1.7cm) diameter x 2.75" (7cm) long. Recommended for ages 3 and up.