Are you talking about the scoring zones? Or the sizes?
The diagram above tells you the scoring zones. The different sizes of target depend on the rounds being shot. Just pay attention to the full face targets for now (as in the picture). Later on you can look at three spot or the reduced size versions.
Depending on what you think your daughters ability is, start on a 122cm face at whatever distance you fancy. If she gets most arrows in the gold then either increase the distance or reduce the target size to 80cm, then 60cm, then 40cm.
That's how I would do it anyway. Later on you can set up the distance and target size required by a proper round such as FITA-18 or Portsmouth and have a competition.