The average height and weight of a 20-year-old Japanese man is 173.2 centimeters and 64.6 kilograms, and for women 156.4 centimeters and 50 kilograms. Japanese people are for the most part racially homogeneous, with few individual physical differences between them. Their skin color is classified as being yellow. Hair is generally black, though many young women dye theirs brown. Eye color is generally considered to be black, though this is often described as brown in English. Westerners often think Japanese people appear younger than their real age. There is not much difference in body shape between middle aged and younger Japanese people.