Prohibition Signs are a Red circular band with a diagonal bar on a White Background. The Black symbol behind indicates what type of action employees and visitors need to avoid doing for their own safety and comply with company rules and regulations. No smoking signs must be displayed at each entrance to a workplace. Additional no smoking signs can be used internally to help ensure a smoke free policy is adhered to. Size: W100mm x H150mm. Window Cling Vinyl. Designed and manufactured in the UK.