Here is what I was told; not sure if kids clothes are the same. I have noticed that in my clothes that again this past yr the sizing has changed and I went from a size 6 to a size 4; not that I've lost that much weight. I was told that while manufacures have changed sizes to I guess help peoples egoes the pattern sizes have not changed. I haven't made any for a while so I don't know. Look at the back of the pattern and take a few measurments and compare them to the measurements of your child to know for sure.