We bought this little sleeper from Baby Gap back in July when Chase was 4 months old. We bought a 3-6 months size thinking that would be right size...Well, not so much. As you can see from the first picture, this is how big it was on him at the time. I stuck it back in his closet with the intention of pulling it back out when he was big enough for it. Well I forgot about it and just stumbled upon it a few weeks ago. Even though he's almost 11 months old, luckily he can still fit in it. (It's so wierd how varying sizes can be based on the store...) It was interesting, though, to see compare how he's grown.