What are the minimum dimensions for the STOP/SLOW paddle?

Answer: A — 24 inches minimum for the paddle and 6 feet minimum for the staff.

The key idea here is visibility and reach for a flagger controlling traffic. A paddle that is at least 24 inches wide provides a large, easily recognizable signal surface that drivers can see and interpret from a safe stopping distance, even in busy or sunlit conditions. A 6-foot staff keeps the paddle high enough and well clear of the roadway, allowing the flagger to stand back from traffic and still be clearly seen by approaching motorists. Smaller paddles or shorter staffs reduce visibility and the safe distance the flagger can maintain, which can delay driver reaction and increase risk. While larger paddles or longer staffs exist, they go beyond the minimum; this question focuses on the smallest combination that meets visibility and safety needs.