How much should infant eat?
I believe that a new born begins with 2oz than gradually the amount of milk is increased according to their needs. One month old possibly 3 to 4oz and so on. I don't believe a baby under 5 month should be fed more than 6 oz. Especially being that a baby is fed every 3 to 4 hours.
Infants know how much they need to eat. They also know when. Give them as much as they want.