What shape is a stop sign?

A stop sign is octagonal in shape, which is a distinctive feature that makes it easily recognizable to drivers. The eight-sided design is standardized in many countries, making it an iconic symbol for stopping at intersections. The reason this specific shape was chosen is to ensure that the sign stands out from other traffic signs, which typically have different shapes, such as circular for yield signs or rectangular for informational signs. This unique octagonal shape helps convey its critical message to drivers effectively, reducing confusion and promoting road safety.