how many ounces milk should give a 4 month old baby ?

A. the baby's tummy is very tiny.. so they cannot hold more .. they need to refill it again and again... generally this age baby needs to feed in every 2 hours.. at each feeding they feed upto 45-60 minutes.. (if breastfeeding) .. And for expressed or formula milk, they will feed 60-120 ml in one feed and in a gap of 2-3 hours... in total 600-720 ml per day but then each baby is different.. you should follow your baby's hunger cue... Feed him as per his demand....