I am worried my penis is too small... it is about 5 inches soft and 7.5 inches hard. idk if that is big or small... is there anyway to make it thicker?

Hard to find info...: Hard to find good, consistent information on penis sizes, but several doctors on HealthTap have offered opinions. It looks like the average erect one is 5-6 inches, so if one is worried about being less than 4 inches erect, he can talk with his doctor. When non-erect, perhaps under 1.5 inches would be small. In the end, function wins over size.