What is the minimum letter height required for "No Smoking" signs?

The minimum letter height required for "No Smoking" signs is 2 inches high. This standard is in place to ensure visibility and readability, especially in environments where safety is a primary concern, such as areas dealing with flammable gases like LPG or CNG. A sign with letters at least 2 inches tall ensures that the message can be easily seen and understood from a reasonable distance, which is crucial for effectively communicating safety protocols and preventing accidents. Proper signage is a vital part of maintaining safety in areas where hazardous materials are present, and adhering to these standards helps promote a safer environment.