Hi. With the weather starting to cool (finally!) I am looking into getting Chica some clothes. I'm leaning towards starting with a a Zack and Zoey hoodie and a Z&Z sweater dress. My question is: Per her measurements, Chica would wear an XS in both, but a few of the reviewers mentioned Z&Z clothing runs small. What has been your experiece with the sizing of Z&Z items? Thanks. It's so good to have people with more chi experience to ask questions of!