I'm having a flashback to the "Blues Brothers"...
I have all the sizes but for the custom fill version.She said "That all depends on what you're packing...Regular or King size.
The "whopper" is very clothing dependent if I don't want to look like I'm carrying a "Spaldeen" inside my pants. But it is quite comfortable when I can manage to wrestle it in place.
(For those of you who didn't grow up in NYC, a "Spaldeen" (Spalding) was the pink rubber ball, which, along with the higher end "Pennsy Pinky", was used for stickball and other street sports.)