Although the size of the penis varies from man to man, it probably has less relationship, physically or structurally, to other parts of a man's body than any other bodily component. Measurement of flaccid size may not be a valid test to assess the true length of the penis. Many men with large flaccid penises experience relatively little growth in erectness, whereas the man with a smaller flaccid penis sees a dramatic change in size on becoming erect.
Medically speaking, most so-called micropenises are actually normal sized and may simply be buried in the dense suprapubic fat (fatty tissue above the pubic bone) usually found in obese men. The procedure to lengthen these penises is relatively simple. When the suprapubic fat pad is pulled upward, the penis is usually found to have a normal length. For those men, exercise and diet alone may reduce the fat pad and provide natural penile elongation without the need for any medical or surgical treatment.
In exceptional cases, when the penis is truly small - measuring less than 1.8 inches in the flaccid state and less than 2.8 inches during erection - and especially if this is actually causing severe psychological disturbance, surgical elongation of the penis may be attempted in an effort to add about 1 - 2 inches to its length. Unfortunately, several surgical techniques for lengthening and widening a short and narrow penis have proven largely unsuccessful, for example, dividing the suspensory ligaments that attach the base of the penis to the pubic bone.