Statures and weights of two national samples of Jewish children, from 9-15 months and 7-10 years of age, and their birth weights were studied, based on personal records (n = 7,532 and 4,638 respectively). Comparison with the National Center for Health Statistics (NCHS) median indicated that the median birth weight of the population is similar to the reference population. At both ages, males and females were slightly lighter and shorter than the reference data. Although the differences are small, <25% of the respective standard deviations for weight and stature, they are statistically significant due to the large sample sizes. The magnitude of the difference, however, has no biological meaningfulness. Jewish children of Asian and African origin have lower weights and statures at 8.75 years of age than Jewish children of European or American origin. The maximal differences between the ethnic groups are 1.4 kg and 2.5 cm in males after adjusting for maternal education, age, and birth order. The similar growth of Israeli children relative to NCHS reference data suggests that their growth is relatively unconstrained. The NCHS data are thus the reference of choice for the Israeli Jewish population. The small difference between ethnic groups, the continuously changing ethnic composition, and the homogenization of the population over time justify use of one standard for the heterogeneous Israeli population. Worldwide migration in the 1990s, considerable immigration to Israel, and heterogeneous gene pools in most countries make the construction of local standards irrelevant. © 1995 Wiley-Liss, Inc.