SIZES - Contains 8 double sided tools. Diameter of the tools range from 0.5mm to 8mm and create different sized dots from .02 to .4 inches (0.5mm to 10mm). The sizes are incremental to allow a larger selection of dots and to allow more designs. The crisp edge and design allows for the perfect dot to form without experience, practice or artist skills Use with: Acrylic fluid paint (not included) to create perfect round painted dots. Environment: We care about the future of our world, so these tools are made from recycled plastic. This painting system requires minimal paint, and any excess is wiped off onto a tissue, helping minimize the paint in our water/waste system. Please use with any fluid acrylic paint. (Using enamel paint, or wiping with any alcohol or solvents will crack the tools over time) (Large sized dotting tools - size 17-28 are also available for purchase).Please note, all reviews are organic and have not been solicited, discounted or paid for.