Yes, there are regulation pickleball ball dimensions that all balls should adhere to. In order to be used in approved and regulated pickleball games, pickleball balls must:
Have a diameter that is between 2.874 inches (7.30cm) and 2.972 inches (7.55cm)
Have a circumference that is between 9.03 inches (22.93cm) and 9.34 inches (23.72cm)