Unlike Vinyl, Guardhouse Shield page are made from Polypropylene, which is a stable, inert material. Thinner, stronger and less susceptible to tearing and stretching. 9 Pocket Guardhouse pages can hold and protect 2 1/2 x 3 1/2 sports cards, baseball cards, and gaming cards at a fraction of the price! Pocket size: 2.5x3.5.