4 month old stuck in a 6 month old body

Addison had her 4 month check-up and she averaged the 96th percentile again. The doctor said she is a 4 month old in a 6 month old body. She weighed 16 pounds 15 1/2 ounces so pretty much 17 pounds! She is 26 inches long. Addison is trying her hardest to grow as big as her cousin Sophia and quite frankly I think she may end up bigger than Sophia within another month or two. Watch-out Sophia!