Here is the official Throw Bowl court measurements. Note There is no size rule for wall above explosion point! The Wall and Court can be Cement, Concrete, Phenolic Resin, or Asphalt. Sport Bowling requires courts to made of Concrete Only.Must be a minimum of two (2) courts directly attatched with a meridian (divider) of no more then 1 INCH high and 1 INCH wide.