View & sort existing RPM packages

rpm -qa --qf '%{SIZE} %{NAME}\n' | sort -nr | less

Sample Output:
186925230 kernel-source
184937329 kernel-source
74392320 rpmdb-redhat
44488420 emacs
42509842 glibc-common
41262406 libstdc++-ssa-devel
31483893 frontpage
27851009 perl
25825586 comps
23352847 kernel
23219902 libgcj-ssa-devel
22570875 kernel
21628214 rpm-devel
21543354 kernel-smp
20757085 kernel-smp
18808196 gcc-gnat
17833551 MySQL-server
17596278 ant-libs