In 3-year-olds, growth is still slow compared to the first year. Most children have become slimmer and lost the rounded tummy of a toddler. While all children may grow at different rates, the following indicate the average for 3-year-old boys and girls:

  • Weight: average gain of about 4 to 6 pounds per year
  • Height: average growth of about 2½ to 3 inches per year