Unlike Vinyl, Guardhouse Shield page are made from Polypropylene, which is a stable, inert material. Thinner, stronger and less susceptible to tearing and stretching. 3 Pocket Guardhouse Archival pages can hold and protect 8 x 3 1/2 photographs, sport cards, gaming cards, currency at a fraction of the price! Pocket Size: 8.5x3.75.