Lots of Stretch & Super Soft! The zipper closure is the best part - no more fighting buttons and your kid is free to roam in the best fabric there is in, of course, the cutest prints! 6Mo (0-6mths) = Length 21-1/2", Chest 8, Hips 9" 12Mo (6-12 mths) = Length 23", Chest 9", Hips 10"