The study was carried out in Benue State to determine body size and shape of adult females of Tiv, Etulo and Igede ethnic groups. The sample size was 90 adult females. The research design was quasi experimental design. Data were analyzed using percentages. The study revealed that many variations existed in the sizes within members of same ethnic group and between the different ethnic groups. Predominant shape of adult females of Tiv, are (Pear 36.6%, Apple 36.6%), Etulo (Banana36.6%) and Igede(Pear 30.0%). The study revealed that no adult female has the ideal body size characteristics of (90x65x90)cm. Recommendations include: Home economic extension workers should educate females of child delivery age to achieve desirable shapes in adulthood (pear and Hourglass). Garments designers and constructors should utilize size chart for different ethnic groups to ensure perfect garment fit.