Elmer"s CFC-Free Polystyrene Foam Board, 30 x 20, Graystone with White Core, 10 Per Carton: * This foam board is 3/16in thick and cuts cleanly with an X-ACTO knife (sold separately) * Ideal for presentations; school projects or backing for thinner papers * Foam board is easily cut to any size desired * Size: 20 x 30in * Made in USA