A poorly hung board is more than an annoyance; it ruins your practice. Here are the DRA (Darts Regulation Authority) standard measurements.
Height: The Bulls-Eye Line
Measurement: 5 feet 8 inches (1.73 meters) from the floor to the dead center of the bullseye.
Distance: The Oche
Measurement: 7 feet 9.25 inches (2.37 meters) from the face of the board (not the wall!) to the back of the throwing line.
Pro Tip:
Use a "dead-head" bracket rather than a single nail. It prevents the board from rotating and ensures a secure, flat fit against the wall.