This chapter describes the development and validation of a body-image assessment tool, the BIAS-BD. The scale consists of 17 male and 17 female contour-line drawings based on known anthropometric body dimensions of shoulder, chest, waist, hip breadth, thigh breadth, and upper leg breadth. The drawings correspond to a series of body weights ranging from 60% below the documented average to 140% above average. Differences between drawings represent a 5% change in body weight. Participants select a drawing that reflects their perceived size and their ideal size. The discrepancy between perceived and ideal size is a measure of body dissatisfaction. Test-retest reliability over a 2 –week interval was r = .86 for actual perceived size, r = .72 for ideal size, and r = .76 for body dissatisfaction. All reliability values are significantly greater than 0. No significant differences in reliability values between genders were obtained. Concurrent validity, measured as the correspondence between perceived and report size, was r = .76. Unlike other scales, the present scale uses figural drawings based on known body dimensions and has superior reliability and validity. It avoids several problems inherent in existing contour-line drawing scales, including scale coarseness, the presence of ethnic facial and body features, and the lack of documented reliability and validity in most previously published scales.