LOVE the adorable designs on these pajamas, but be aware that they do run significantly smaller than other brands of the same size. I should have bought the 6-9 mo size of these pajamas for my infant at 3-4 months old, which is saying something because my baby was born at 5 pounds (2nd percentile) and is currently 15.5 lb at 6 months and only in the 17th percentile, so he's a small boy and these pajamas are still too small for him!!