22.5 cm. Earn cash for your school! Box Tops for Education. Did you know? Making, using and disposing of foam plates requires 50% less energy than paper plates of comparable functionality. Learn more at: hefty.com/sustainability/facts-on-foam. This product is manufactured without the use of ozone depleting materials. CFC free. To contact us visit Hefty.com, call: 1-800-433-2244 or write: Hefty Brands, PO Box 85583, Richmond, VA 23285-5583. Product made in the USA.