As per your measurements, his weight is on the 10th percentile and his height is between the 25-50th percentile which indicates he is normal for his age. He is not underweight. As a guideline for an 17-24 month old child should eat the following: Dairy or dairy sub 4 feedings a day – Milk (4oz), cheese (½ oz), yogurt (½ cup), or cottage cheese (¼ cup). Starch 4 feedings a day – Cereal (¼ cup), pasta (¼ cup), rice (¼ cup), bread (½ slice), or crackers (2).