Hello! My 3.5 month old sleeps anywhere between 4-6 hours for day time naps. But he is a pretty good sleeper la haha because easy temperament and this kind of thing partly just luck of the draw Since birth I've been following his wake windows - I think that's single-handedly the most effective thing that helped with my baby! Now he is quite routined - wakes up, sleeps and feeds at around same time everyday :""