Consider taking L-arginine. This is an amino acid that leads to increased blood flow, helping the penis get larger during an erection. A study conducted at Tel Aviv University showed that some men experienced improvements after taking the supplement for 6 weeks. It's available in natural food stores, and the recommended dose is 1 gram (0.035 oz) three times a day.
Penis size is determined by hormone exposure and varies greatly from one individual to the next. The average length of a flaccid penis is between 3.4 and 3.7 inches, while the average length of an erect penis is between 5.1 and 5.7 inches. The average circumference of an erect penis is between 3.5 and 3.9 inches. Learn more about the average penis size.
The vacuum pump. This is a cylinder that sucks out air. You stick your penis in and the resulting vacuum draws extra blood into it, making it erect and a little bigger. You then clamp off the penis with a tight ring -- like a tourniquet -- to keep the blood from leaking back into your body. What are the drawbacks? The effect only lasts as long as you have the ring on. Using it for more than 20 to 30 minutes can cause tissue damage. This is sometimes used as a treatment for erectile dysfunction, but has not been proven to actually increase the size of the penis.