The purpose of this study was to investigate the role of sex and finger size on fine motor performance. One hundred forty-seven undergraduate participants were administered three fine motor tasks (Purdue Pegboard, Grooved Pegboard, and Finger Tapping Test), three questionnaires (gender role, handedness, and demographic information), and finger size was measured. Data were analyzed with a series of hierarchical regressions. Hypothesis 1, that finger measurements closer to the fingertip account for more performance variability, was not supported. Hypothesis 2, that individuals with smaller sized fingers perform better on fine motor tasks, was supported by pegboard tasks but not finger tapping. Hypothesis 3, that sex differences would not be observed when finger size was included in the statistical model was supported or showed a trend toward support by 7 of the 9 fine motor task subcomponents, implying that finger size is at least as important as sex when predicting fine motor performance.