A NCAA softball field must be rectangular and have a minimum size of 200 feet by 400 feet. The infield must be dirt, while the outfield can be either grass or artificial turf. The distance from home plate to each foul line is 60 feet, and the distance from home plate to first base is 90 feet. There are also two semi-circles with radius of 8 feet that are drawn in the outfield; these are the boundaries for the pitcher when she is pitching from within the pitcher’s circle.