A racquetball court; fully enclosed indoor or outdoor with a front wall. The standard racquetball court is rectangular: 40 feet long, 20 feet wide, and 20 feet high with red lines defining the service and serve reception areas. The "service box" is formed by the short line (a solid red line running the court's width parallel to the front and back walls at a distance of 20 feet) and the service line (which runs parallel to the short line and is 15 feet from the front wall). Within the service box there are two sets of lines perpendicular to the short and service lines. One set of lines is 18 inches from, and parallel to, the side walls.