In outdoor fistball, the field size is 50 m long x (25 x 20 m per half-field) by 20 m wide. In indoor fistball, the field size is 40 m long (20 x 20 m per half-field) by 20 m wide. Since the indoor field size corresponds with the regular size of a handball field, the existing external lines are usually used. The service line is 3 m away from the center line. The server's stationery foot (for standing serves) or first landing foot (for jumping serves) must be completely behind this line when serving. The boundary lines belong to the field, i.e. when the ball touches the line, this is not an error and play will continue.