After this discussion, the size class system was redesigned; the numbers used to be on this class are now split over four classes. Go to:

- List of googologisms/Epsilon level for numbers below \(f_{\zeta_0}(10^6)\);
- List of googologisms/Binary phi level for numbers between \(f_{\zeta_0}(10^6)\) and \(f_{\Gamma_0}(10^6)\);
- List of googologisms/Bachmann's collapsing level for numbers between \(f_{\Gamma_0}(10^6)\) and \(f_{\psi(\varphi(1,\Omega+1))}(10^6)\); or
- List of googologisms/Higher computable level for numbers above \(f_{\psi(\varphi(1,\Omega+1))}(10^6)\).