The toilet rolls I use are 6.5 inches around, I can fit most of my cock in one, but not all - though my erect penis is not perfectly cylindrical.
And you think you aren't big?!?! Think again, my friend...
I'm curious as to the size of the toilet rolls others have used - are American rolls much smaller than in the UK?
When I say curious, I actually mean I'm bored, but I'd still like to know.
Yes, U.S. toilet paper tubes are 5.5" in circumference.
I measure about 5" around at the thickest point. Like yours, my penis isn't cylindrical, it's wider viewed from top that from the side. That's why I can't fit the toilet paper tube all the way down.