The "Standard Man" or "Reference Man" is a theoretical model established by the International Commission on Radiological Protection in 1974. This individual is defined as being 20-30 years old, weighing 70 kilograms (154 lbs), and standing 170 centimeters (5'6") tall. The definition specifically identifies the subject as a Caucasian of Western European or North American habitat, a standard now criticized for its lack of diversity.




