I really have to wonder about the reviews that say this outfit fits great....I bought the 0-3 month for my 1 month old and it was too small to get on him so I sent it back and exchanged it for the 3-6 month size. My son, not even 2 months old, can barely fit into the 3-6 month outfit! It is super snug. He is only 10lbs. It's a very cute outfit, but very small. Also thread is coming off the outfit already. Very disappointing because it is so cute.