At nine months!!! 17.7 head cir., 29 inch long, and 19.? lbs. We don't have a scale at home so we will find out his exact weight the next time we visit a pediatrician. Isaac is so...active. He's cruising in his crib and playpen. He can crawl very fast especially chasing after something he is interested in. He loves to walk with our help and climbs onto boxes and goes under our dinner table to play on the floor. He is so smart and funny. He dances to music and waves at us when we wave at him.