MegaChess Giant Plastic Chess Sets are our most popular sellers. We make sets that are 8", 12", 16", 25", 37" and 49" tall. The plastic MegaChess pieces are made of indestructible high-density polyethylene (HDPE) recycled plastic. These chess pieces are rugged, waterproof, and UV-resistant injection-molded, hollow plastic. The chess set withstands the outdoor elements very well and will retain its color. We have these sets in the heat of the Middle East, the humidity of the Far East, the cold of the Rocky Mountains and the salty air, sun and sand of the Southern California beaches.