It is about average, as you indicate in reaponding. You didn't make reference to this particular research on erect penis size, but you did include refence to other work by the same group, and I consider it a highly credible finding of mean circumference of 4.8 inches. Mean lengh was 5.6. Also, as noted in your research here, variability and variation of penis size is remarkable. The findings of the Herbenick study with respect to mean, weren't surprising to those researchers, becasue they were in line with others' findings. However, what was most striking to them was the range. The smallest subject had a penis of only 1.5 inches in erect length, the longest 10.2 inches. The difference in experience for a woman, solely with respect to such penis-size differences, is amazing.

http://onlinelibrary.wile...

It is interesting that folk wisdom is that thickness is far more important to women than length is, and your finding here was that average thickness is preferred, with slightly above-average length. It may be that the positive advantage of greater thickness in coitus is offset by disadvantage in fellatio or anal penetration, when considering all activity with a given partner. Most interesting.