Sizing is important for jewelry intended for young girls. The smaller sizes usually have a limited availability. For necklaces, use a string to measure the length around the neck of the girl, including the intended drape. This will be the size chain to purchase. For bracelets, measure tightly against the wrist, and then add a half inch to know the appropriate size to purchase. The chart below details ring sizes for young girls, along with a general age range.
The age ranges vary and overlap, sometimes widely. This is because children grow at different rates. Measurements should be taken whenever possible to ensure a good fit.