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The current cross-sectional study investigated the relationship between the Peak Expiratory Flow Rate (PEFR) and the anthropometrical parameters (body mass and height) among female bakers who are exposed to flour dust. A total of One hundred and twenty (120) participants were investigated with sixty (60) female bakers (study group) who are exposed to flour dust and sixty (60) control subjects. The PEFR and anthropometrical parameters were measured using the mini-Wright peak flow meter (PFM 20, OMRON) and Detecto PD300MDHR (Cardinal Scale manufacturing company, USA) column scale respectively. The PEFR of the study and control groups were compared using descriptive statistics and T-test analysis. A model was developed to determine the PEFR with four factors of body mass (kg), height (cm), age and year of exposure where applicable. The study showed that the mean value of PEFR in female bakers was 158.17 ± 12.55 L/min with 267.50 ± 26.85 L/min for the control study. The result of the model also revealed that bakers have 158.07 L/min PEFR as against 267.96 L/min for control study. The study concluded that with model developed, individuals who are susceptible to lung function impairment can easily be diagnosed and given or recommended a medical treatment.