As other reviewers said, the overalls fit slightly big which is fine, but the jacket fits small, like a 3T. Not much room for layers. My daughter is on the petite side, too. The hood is very shallow and only fits the back of her head (she has a normal head size) and there is nothing to cinch it to hold it up. The metal zipper pokes her face when fully zipped so Ill have to keep it down and use a gaiter. The sleeves are pretty short and the openings are twice the circumference of her wrist. Im going to try sewing them smaller to keep out the cold air. The price was great, and it looks very cute, but I wish I had spent a little bit more for better quality.