I'm not one to measure my genitalias but for the fun of this thread I just did. I'm pretty average, nothing spectacular: 3.5 in when flaccid (when relaxed, good mood, warm weather and all) and when erected I got almost 7 in. Measured from the pubic area. As for the girth I got nothing to evaluate it, I just know I'm not long and skinny, I believe I have the girth to go along my size. I've never had any complaints so. I was never worried about my size anyway but this "exercise" was fun
The human penis is an irregularly-shaped three-dimensional appendage. The only way to measure it accurately without medical imaging equipment is through a water-displacemet test. The use of medical equipment for this purpose would be a frivolous use of such equipment, thus the water-displacement test. You can do this in your kitchen easily and safely with only items already in your kitchen within about 5 minutes. However you measure it, the result has to be a volumetric value (cubic centimeters or cubic inches). Anyone who tells you that the result should be linear length and circumference has no idea what he's is talking about. Sure, you could derive a volumetric value from it, but it wouldn't be anywhere near accurate. The human penis is only roughly cylindrical. It isn't a cylinder. Take no advice from the drooling masturbators among us. The size of a three-dimensional appendage can't be expressed as a linear value. The "size" of a penis could be expressed in squared units of measure as surface area, rather than in cubic units of measure as volume, but surface area is more abstract and more difficult to measure. It's conceivable, but I don't recommend it. Size is volume.