Back to Home & Garden Gallery Cow Skull By Alisa Natal The pattern is enlarged on a copy machine to the desired size, then traced onto the foam. Alisa used a 24"x16"x2" piece of foam. The outline can be cut out with the Hot Knife or Scroll Table. The edges can be trimmed with the Sculpting Tool or Hot Knife. Hot Tip: Coat the skull with Hot Wire Foam Coat for a more realistic bone feel and look.