I need help on my baby

How much to I feed my baby his 4 days old and I only feed him 15 ml but I couldn’t get that same bottle same level but they say in ounces. But I don’t know how much in ounces should I give him am I feeding not to much or how much are you ladies feeding your little ones. I feel like I’m feeding to much but his being so fuzzy that don’t know if I’m feeding him a lot. I feed him every 3 hours. How many ounces should I feed a 4 day old newborn help me please