What is the minimum height for letters on Stop/Slow retroreflective paddles?

The correct answer highlights that the minimum height for letters on Stop/Slow retroreflective paddles is 6 inches, which ensures maximum visibility and readability for motorists. This standard is in place to guarantee that the paddle can be seen from a sufficient distance, especially in varying weather conditions and lighting situations. The use of a minimum letter height of 6 inches helps maintain uniformity across traffic control devices, ensuring that drivers can quickly recognize and respond to the signals given by traffic control personnel. This height is mandated by safety regulations to promote the safety of both the flaggers and the driving public.