From a black exclamation point on a yellow background to a lit match with a line through it and a white fire extinguisher beside a blazing fire: symbols that warn us of hazards, prohibit actions or recommend specific measures are permanent fixtures in workplaces and in everyday life. All of these safety signs and symbols are regulated in the ISO 7010 standard. Since its introduction in 2012, it has standardized the use of occupational health and safety symbols internationally. ISO 7010 sets out requirements and standards for the use of safe condition, prohibition, mandatory, warning, and fire protection signs. In this article, we will outline the most important aspects of this standard and give an overview of the symbols it regulates.