I bought the two year old size costume and it was not for a 14 month old.  Yes, it fit, a bit loose.  but he HATED the hood.  I rated this so high because I thought the costume was really cute, really nicely made and it was my stupidity for not thinking ahead about baby hating things on his head.  It is totally fuzzy, so I wouldn't suggest it for warmer climates.  I'm in Atlanta, and it was a bit warm for Halloween.  but very VERY cute!!!!