Just got this in the mail and it was perfect. The jacket has fleece lining so Im sure it will be super warm. We are going on a ski trip and I wanted my daughter to have a colorful suit that fit well.. She is 4 years 7 months old and very petite (31 lbs)  so I ordered her a size 4 and it fits great. Gives her some room for growth and we will probably be able to use it again next winter. I am happy with the purchase.