The professional PU surround has a thickness of approximately 3.5 cm. The PU material protects the wall from damage and minimizes the number of darts that fall, thereby also preserving the darts and the floor. The new improved fit, with an inner diameter of about 45 cm, fits perfectly on any standard bristle dartboard. One size fits all. The catch ring can be easily mounted on the dartboard. The width of the protective ring provides ample protection for the wall, even for inexperienced dart players.