According to a study done by scientists from the University of New Mexico and University of California, 75 women were asked to choose their preferred sizes from a range of 3D models of human penises. The study revealed that the average penis size that was chosen by majority of the women aged 18 to 65 was 6.3 inches. The study made it clear that women do have an affection towards larger penis sizes. However, this must not dishearten you if you are below this size. Most women are satisfied with penis sizes smaller than this. When it comes to satisfying a woman, its not just about the size of your penis but how you perform in bed.