Okay, I'm the only one here who can make an informed opinion on matters of size. Most straight guys only see their own penises and porn actors while hard. They may glance at the gym, but softies don't count for the most part.
We homos, however, know how we measure up.
I've seen laughably tiny penises and monstrously large ones. Shank is somewhere in between. I'd say he's pretty much average.
If anybody else would like me to rate them, you know how to contact me.