Height, weight and body proportions were studied in 155 Turkish school children born in Sweden, living in a defined area in Stockholm. They were compared with Swedish children matched for sex, age and physical environment, and with a smaller number of Turkish children born in Turkey or in countries other than Turkey and Sweden. Parents' socio-economic levels were extremely low on a Swedish comparison. Growth was correlated to socio-economic background. The study was cross-sectional and longitudinal, combining growth data for key ages from health documents with contemporary data. Turkish schoolchildren under 10 years of age, born in Sweden, were significantly shorter than Swedish children, the difference beginning in the pre-school years. Turkish children born in Turkey were short on arrival in Sweden but soon caught up with the Turkish children born in Sweden. Genetic factors only could not explain the difference in height-for-age between Turkish children born in Sweden and Swedish children. With a longer period of stay in Sweden an increase in height-for-age would be expected.