I don't think AG would ever make the dolls different heights intentionally. But I have an idea if you want dolls of different heights. My Samantha doll is about an inch shorter than my other AGs. She has a slightly shorter body than my newer dolls because they have made some changes to the way they sew the bodies over the years. You could always get an older Kit doll and then when you get a new Ruthie, she will be taller than Kit.