My son is about to be 2 months old and hes all ready 13.15 lbs and 24.5 inches. My friends 5 month old is the same size almost shes just a few ounces bigger. My son is chunky but so loved. His dr said I am over feeding him by giving him 6ounces 2x a day when he gets 4oz for all of his other feedings. My son sleeps from 4-7 hrs depending on when we put him down for the night. Hes allready at one feeding in the middle of the night. Hes growing up way to fast. :/