Books like Cato Maior de Senectute
Cicero
Cato Maior de Senectute is 184 pages, about 3 hours 22 minutes at 250 words a minute.
12 books to read next
How long each takes
Phaedo 3.6 h 
Nicomachean Ethics 6.0 h 
Epistulae Morales Ad Lucilium 6.2 h The Dialogues of Plato / The Seventh Letter 14.9 h 
The Prince 2.9 h 
Meditations 3.7 h 
The Republic 7.3 h 
La Poetica 5.7 h 
Leviathan 9.3 h 
De Rerum Natura 5.2 h 
Maybe Someday 10.3 h 
Letters from a Stoic 4.7 h Bar height shows length. Estimated at 250 words a minute.