[en] The aim of this was to evaluate the renal size in children with different ages, based in normal DMSA scintigraphic data. Material and Methods: We studied the length and width of kidneys measured from normal DMSA scans in children whose age varied from 1 month to 16 years old (91 men, 162 women, age average: 4.3 yr). We built nomograms of renal size vs age and a regression analysis of the data was done. We compared the distribution of scintigraphic data classified by sex and with published US data. Results: The scintigraphic distribution of the renal length vs age is presented. The best fitting regression equation for the whole data was y = 4.3349x ^0.1456 with r:0.88. The lineal regression equation for 1 to 12 month was y = 0.1524x + 4.5668 and for 1-16 years was y = 0.0215x +6.3415. We did not find significant differences between boys and girls and between scintigraphic and published echographic data. Conclusion: 1) Our results support that renal DMSA scan size data are comparable with echographic renal size data. 2) Our data indicate that the growing rate of kidneys by month in the first year is similar to the growing rate by year later, without gender differences