There are lots of stats out there about the average size cock, even country by country. Have any of you seen any stats on balls. I would think one stat would be dimensions of each testicle, another might be weight of testicles, another might be volume taken up by the entire scrotum. (I recently slept with a guy who had an enormous scrotum but average testicles at best. On the other hand, I have an old/close friend with larger than average testicles, but a tight scrotum--not much sack there. And other guys obviously are all over the map in between.)
I read that average size was about 1.5 X .75 inches. That was from the most comprehensive penis size survey on the net.