Common Lisp is big because it's a bridge between MacLisp and InterLisp communities of the 80s. There are much smaller (and just as powerful) Lisps like Scheme or ISLISP.
Scheme is poorly expressive for daily programming and it's because of its small size. The documentation quantity for a useful Scheme like Racket is much larger.
Also, do we count all the pages expended on SRFI's? Or not?