The basketball court may be located indoors or outdoors, and is a rectangular hard surface. The dimensions of the court vary according to the level of play; NCAA courts are 50x90 feet, NBA and WNBA courts are 50x94 feet, and high school courts are 50x84 feet. The court may be constructed of a variety of materials, including wood for indoor gymnasium courts, or asphalt for outdoor courts, and must have clearly defined lines which are 5 centimeters in width.