Pianists and their hands

Rachmaninoff was known for having very big hands. How many keys can yours stretch across? And how big were Rachmaninoff's hands? Max Harrison in Rachmaninoff: Life, Works, Recordings said that "Rachmaninoff could with his left hand stretch C–E-flat–G–C–G and the right could manage C (second finger)–E–G–C–E (thumb under).” 

Below please see two pictures. On the left hand side is Maestro Rachmaninoff's hands. On the right hand side is yours truly!