You can make either a dress or a top using this tutorial. All of my photos are of me making a top. The techniques are the same. The only difference is the length of the finished garment. The measurements I am giving you will be for a DRESS. If you want to make a TOP, you should shorten the length as necessary. I recommend that you measure a top that fits well from the bottom of the armhole to the hem. Make sure you ADD 2 inches to your measurement for hems.
This pattern uses European sizing. To ensure a good fit, measure the height of your child. You should also measure her chest circumference under her arms. You will use this measurement later on.