The Mylar Shims comes in a set of two thin white plates. They are designed to be used with Die-Cutting Machines. The plates assist in die-cutting thin metal cutting dies and embossing folders by filling a gap within the layers of a die-cutting or embossing sandwich or to be level, when needed. Approximate Size: Mylar Shims: 9.625 x 6.0625 inches./24.45 x 15.40 cm.