Objectives: Secular trends in body height have been proved indicative of socio-economic development of a country or a region, as well as of childhood and adolescent (mal)nutrition. Being taller has been associated with enhanced longevity, with several body height related factors involved. While basic anthropometric measurements, including body height, have long been performed in developed societies, primarily in men and children, far less data are available for adults and women in particular. The aim of the present cross-sectional study was to collect basic anthropometric data related to the assessment of nutritional status of adult population, both men and women, to establish normative anthropometric data, and provide intergenerational analysis for height, body mass, and body mass index (BMI) of adults of both genders. Subjects and methods: Body height and body mass data of the participating 845 volunteers were collected from March 2017 to April 2018 by trained interviewers during home visits. BMI and gender-related percentile values were calculated, and percentile curves constructed. The protocol of the study was approved by the Medical Ethics Committee of the Republic of Slovenia. Results: Eleven weighted percentile values (3, 5, 10, 15, 25, 50, 75, 85, 90, 95, and 97) for body height, body mass, and BMI are presented, as are the non-weighted percentile curves for these parameters for both, adult men and women. Secular trends and age-related height loss of the reported parameters are being discussed. Conclusion: The reported percentile values provide an insight into the secular trend of body height, mass, and BMI of an understudied population, i.e. adults of both genders in a transitional society. As such, they can be useful to researchers, ergonomic professionals, health programme coordinators, and policy makers.