When does a man fall into 'a world too wide for his shrunk shank'?

In the sixth stage of life, man has entered into old age and he begins to lose his charm. He does not look physically or mentally appealing. He shrinks in stature and personality. He becomes thin, wears spectacles and the skin around him hangs loosely. His clothes do not fit him and hang on his frame while his once manly voice turns into a childish one.