congrats you are large! larger than average (which is approximately anywhere from 5.3 to 6. inches long. hang your head high my friend hang your head high!
I'm 7.5" when wanking or oral sex and I've been always told it's big so I would say that 7" is still big, but even a little shorter than 7" if it's very thick[*]
[*]: cock are in two dimensions, and perhaps thickness is more important to most people than length although the length is what catches the eye