I was with a guy who was smaller then you are. The first time was not so good but the second time was much, much better. Its all a matter of finding what works for you two together. They guy is now married with kids so it deffinitely worked out for him.
What's the size? It doesn't look that small. You can still please a woman. I would quit worrying about it.
You dont need to post a picture if you think you're too small, using a measuring tape would provide more accurate information. Your ability to post cock shots on here is limited. If your discussing the effects of STDs or Circumcision, then sure, a pic is worthwhile, but penis shots for the sake of penis shots is not a good enough reason.