my almost 4month old baby still eats 5oz per feeding

Kim
Hi i know all babies are different but i am a little concerned about the amount that my baby takes. He usually can't take more than 5 oz per feeding (it is my pumped breastmilk) and still eats every 3 hour or so.  I feel like he should eat more per feeding and the interval should be longer at this point. He is a big baby and weighs a little over 20lbs 😅 How often / how much do your babies eat and how old is your little one?