i bought this costume (12-18 months)for my 16 month old who is very small for her age.  She is still less than 20lbs and only 29inches tall and she is still in 12 month clothing so i was for sure that this costume would fit and if anything be a little big for her.  I was extremely shocked when i got it and put it on her and it barley covers her diaper it is so short!  Now i need to find a diaper cover that is
pink and either stocking or leggings that are pink so she is not freezing cold for
halloween. and its not like i can return it and just get a size up because the top where the white collar is would just swallow her in a different size, this one part of it almost does like i expected originally and is a little too big.  other than sizing it is just as cute as the picture shows and i will make it due.  good luck!