The purpose of the study was to assess physical development parameters in teenagers. The study comprised 948 healthy teenagers aged 16-18 years (591 girls and 357 boys) attending secondary schools in Lublin. The current body mass and body height of the examined teenagers were assessed and compared to reference values expressed in percentiles and elaborated by Mother and Child Institute in Warsaw. Body mass indices were also calculated. In girls the body mass ranged from 47.0 to 95.0 kg. The mean value of body mass was 57.1 kg and it was located within 50-75 percentiles. Body height ranged from 151 to 185 cm. The mean value of body height was 165.8 cm and it was located within 50-75 percentiles. In boys, the body mass ranged from 43.5 to 110.0 kg. The mean value of body mass was 67.4 kg and it was located within 25-50 percentiles. Body height ranged from 156 to 198cm. The mean value of height was 177.8 cm and it was located within 50-75 percentiles. The mean body mass index in girls was 20.7 and in boys it was 21.3. Obesity was diagnosed in 0.9% and overweight in 6.3% of the examined teenagers. 2.3 % of the examined teenagers had body mass deficit.