This study reports the Spanish version of a new scale for the assessment of body image, developed by Gardner, Stark, Jackson and Friedman (1999). A silhouette method was used as a self-evaluation measure of schematic ideal body size within three groups of women: anorexia nervosa (n= 57), bulimia nervosa (n=57) and normal control (n=168). The results showed that, considering the body mass index as covariant of the results, the clinical groups formed by anorexic and bulimic patients judged their current body size as significantly greater than the control group. In the same way, the clinical groups judged their ideal body size significantly thinner than that considered by the control group. We can conclude that this scale for assessment is a sensitive psychometrical measure of the body image.