Background: We performed an adaptation of the system of evaluation of metatarsal protrusion described by Oller in 1994 to study the metatarsal parabola group. Methods: The system of measurement was applied to the five metatarsals of 169 normal feet (72 feet of women and 97 feet of men) according to the inclusion criteria established. Results: The mean ± SD metatarsal protrusion angle with respect to the second ray in women was 87.49° ± 5.48° for metatarsal I, 70.00° ± 5.74° for metatarsal III, 63.47° ± 4.17° for metatarsal IV, and 56.38° ± 3.27° for metatarsal V. In men, the values were 85.30° ± 6.75° for metatarsal I, 68.00° ± 6.72° for metatarsal III, 60.56° ± 4.61° for metatarsal IV, and 54.13° ± 3.75° for metatarsal V. The comparative analysis between women and men showed significant differences (P < .05) for all of the values of metatarsal protrusion. Conclusions: The comparative analysis between women and men indicates a possible difference between the anthropometric values of these variables in humans, suggesting a possible repercussion on the biomechanical patterns by sex. (J Am Podiatr Med Assoc 99(1): 49–53, 2009)